power steering MITSUBISHI MONTERO 1998 Workshop Manual

Fig. 3: Exploded View Of Power Recirculating Ball Steering Gear
Courtesy of Mitsubishi Motor Sales of America.
Inspection
Check mainshaft for wear and damage. Check tooth surface of

cross shaft and rack piston for wear and damage. Check contact part of
adjusting bolt for uneven wear. Check dust seal, oil seal and "O"
rings for wear and damage.
Reassembly
1) Install NEW cross shaft lower "U" packing (if removed).
Press lower cross shaft oil seal into gearbox housing. See Fig. 3.
Press bearing and oil seal into top cover. Install bearing race and
"O" ring.
2) Apply transmission fluid to seal ring contact areas on
mainshaft, and install seal rings firmly into valve grooves. Wrap
serrated part of mainshaft with vinyl tape. Mount valve body to valve
housing. Install cage and align hole in cage with channel in
mainshaft. Install bearing race and insert balls.
3) Install mainshaft into valve housing while pressing on
bearing race to prevent balls from falling out. Using spanner wrench,
install lock nut and tighten until it contacts bearing race.
4) Tighten lock nut while measuring mainshaft endplay using
dial indicator. When mainshaft endplay is .001" (.003 mm), use a punch\
to crimp circumference of lock nut. Ensure mainshaft rotates freely.
5) Apply transmission fluid to "O" ring and piston seal ring,
and install into gearbox housing. Install rack piston until it
contacts edge of mainshaft. Rotate mainshaft to align ball raceway
with insertion hole. Install 19 balls.
NOTE: Insert balls so no clearance exists between balls.
6) Place remaining 7 balls in circulator and install
circulator to rack piston. Install circulator holder. Install NEW
cross shaft upper "U" packing (if removed). Install upper cross shaft
"O" ring. Apply transmission fluid to rack piston seal ring and insert
valve housing. Rotate mainshaft until rack piston is centered (neutral
position).
7) Install adjusting plate so beveled part is facing upward.
Using a feeler gauge, measure clearance between adjusting bolt and
cross shaft. If clearance is greater than .002" (.05 mm), replace with\
appropriate adjusting plate.
8) Apply multipurpose grease to seal surface of "U" packing.
Apply transmission fluid to cross shaft teeth and side cover "O" ring.
Install cross shaft to side cover, and temporarily tighten adjusting
bolt lock nut.
CAUTION: DO NOT rotate side cover during installation, or damage to
cross shaft oil seal may result.
9) Apply transmission fluid to rack piston teeth and shaft
areas. Apply multipurpose grease to oil seal lip. Install side cover
assembly (with cross shaft) to gearbox.
10) Position mainshaft in straight-ahead position. While
turning adjusting bolt, measure mainshaft combined starting torque
using Preload Socket (MB990228-01) and an INCH-lb. torque wrench.
Combined starting torque should be 4-11 INCH lbs. (.5-1.3 N.m). Center\
reading should be 2 INCH lbs. (.2 N.m) higher than reading at either
end.
11) Tighten adjusting bolt lock nut to specification. See
TORQUE SPECIFICATIONS . Install pitman arm with mating marks aligned.
POWER STEERING PUMP
Disassembly
1) Remove suction connector bolts. Mount pump in a soft-jawed
vise. Remove pump cover bolts and cover. Using a plastic mallet, tap
pulley assembly shaft from pump housing. See Fig. 4.

2) Remove cam ring, vanes, shaft assembly and "O" rings.
Remove snap ring from shaft assembly. Remove collar, rotor and side
plate from shaft.
3) Pry oil seal out of housing. Remove pressure connector.
Remove flow control valve assembly, flow control spring and 2 "O"
rings. DO NOT disassemble flow control valve assembly.
Fig. 4: Exploded View Of Power Steering Pump
Courtesy of Mitsubishi Motor Sales of America.
Inspection
1) Inspect pump shaft oil seal lip and bushing end for

damage. Inspect groove of rotor vane and cam surface for stepped wear.
Check vane for damage. Install vane into rotor groove. Measure
clearance between vane and rotor groove. If clearance exceeds .0024"
(.061 mm), replace entire assembly.
2) Check ring and rotor sides for damage. Replace entire
assembly if any damage is present. Check sliding surfaces of control
valve for obstructions. Replace parts as required. If control valve is
replaced, always use valve with same identification mark as one being
replaced. Check power steering fluid pressure.
Reassembly
1) Lubricate "O" rings and internal pump components with ATF
before reassembly. Install flow control valve spring and control valve
in housing.
2) Install and tighten pressure connector. Depress control
valve to check for smooth operation. Apply grease to lip of oil seal.
Install oil seal into pump body. Install pulley assembly into pump
body.
3) Install rotor to pulley assembly with punch mark at pump
cover side. Install snap ring. Lift rotor to ensure that snap ring is
in countersunk part of shaft. Align cam ring dowel holes and install
cam ring with punch mark on pump body side.
4) Apply transmission fluid to vanes, and install vanes onto
rotor with rounded edges outward. Install "O" ring, cam case and pump
cover. Install and tighten suction connector.
TORQUE SPECIFICATIONS
TORQUE SPECIFICATIONS








\









\









\









\









\









\









\







Application Ft. Lbs. (N.m)\
Adjusting Bolt Lock Nut .................................... 27 (37)\
Idler Arm Bracket-To-Frame Bolt & Nut
Montero ............................................ 40-47 (54-64)\
Montero Sport ............................................ 43 (59)\
Idler Arm-To-Bracket Lock Nut ............................. 101 (44)\
Oil Pump Cover Bolts ....................................... 15 (20)\
Pitman Arm-To-Cross Shaft Nut
Montero ........................................ 108-123 (146-176)\
Montero Sport .................................. 108-123 (147-167)\
Pressure Hose In-Line Fitting
Montero .................................................. 25 (34)\
Montero Sport ............................................ 16 (22)\
Relay Rod-To-Idler Arm Nut ................................. 33 (44)\
Relay Rod-To-Pitman Arm Nut ................................ 33 (44)\
Side Cover Bolts
Montero .................................................. 36 (49)\
Montero Sport ...................................... 41-47 (50-64)\
Steering Gear Hose Fittings ................................ 11 (15)\
Steering Gear-To-Frame Bolts ......................... 40-47 (54-64)\
Tie Rod Adjusting Sleeve Lock Nuts ......................... 69 (93)\
Tie Rod End Castle Nuts .................................... 33 (44)\
Valve Housing Bolts
Montero .................................................. 36 (49)\
Montero Sport ...................................... 41-47 (56-64)\
Valve Housing Lock Nut ......................................... ( 1)
( 1) - Tighten lock nut until it contacts bearing race.









\









\









\









\









\









\









\

* STEERING UNIFORM INSPECTION GUIDELINES *
1998 Mitsubishi Montero
GENERAL INFORMATION
Steering, Suspension, Wheel Alignment, Wheels and Tires
Motorist Assurance Program
Standards For Automotive Repair
All Makes and Models
INTRODUCTION TO MOTORIST ASSURANCE PROGRAM (MAP)
CONTENTS
Motorist Assurance Program (MAP)
OVERVIEW
OVERVIEW OF SERVICE REQUIREMENTS & SUGGESTIONS
Steering and Suspension
AIR RIDE SUSPENSION
AIR RIDE SUSPENSION - AIR SHOCKS AND AIR STRUTS
AIR RIDE SUSPENSION - AIR SPRING VALVES
AIR RIDE SUSPENSION - AIR SPRINGS
AIR RIDE SUSPENSION - COMPRESSORS
AIR RIDE SUSPENSION - HEIGHT SENSORS
AIR RIDE SUSPENSION - MODULES
AIR RIDE SUSPENSION - RELAYS (COMPRESSOR)
AIR RIDE SUSPENSION - SWITCHES (ON/OFF)
AIR RIDE SUSPENSION - TORSION SPRINGS (COUNTER BALANCING)
AIR RIDE SUSPENSION - TUBING
AIR RIDE SUSPENSION - WARNING LAMPS
AIR RIDE SUSPENSION - WIRING HARNESSES
BALL JOINTS
BUSHINGS
CENTER LINKS
CONTROL ARM SHAFTS
CONTROL ARMS
DRAG LINKS
ELECTRONIC RIDE CONTROL SHOCKS AND STRUTS
IDLER ARMS
KING PINS
PITMAN ARMS
POWER STEERING HOSES
POWER STEERING (HYDRAULIC) PUMPS
RADIUS ARMS
RELAY RODS
SHOCK ABSORBERS, STRUT CARTRIDGES AND STRUT ASSEMBLIES
SPINDLES
SPRINGS - COIL, LEAF AND TORSION BAR
STEEL POWER STEERING LINES
STEERING ARMS
STEERING DAMPERS
STEERING GEARS (EXCEPT RACK AND PINION)
STEERING GEARS - RACK AND PINION
STEERING KNUCKLES
STRIKE OUT BUMPERS
STRUT RODS
STRUT UPPER BEARING PLATE ASSEMBLIES
SWAY BAR LINKS
SWAY BARS

POWER STEERING HOSES
POWER STEERING HOSE INSPECTION








\









\









\









\









\









\









\


Condition Code Procedure
Blistered ............... B ........... Require replacement.
Blocked ................. A . Require repair or replacement.
Fitting threads damaged . A . Require repair or replacement.
Fitting threads stripped
(threads missing) ...... A ........... Require replacement.
Inner fabric
(webbing) cut .......... A ........... Require replacement.
Leaking ................. A . Require repair or replacement.
Missing ................. C ........... Require replacement.
Outer covering is cracked
to the extent that
the inner fabric of
hose is visible ........ B ........... Require replacement.
Restricted .............. A . Require repair or replacement.









\









\









\









\









\









\









\


POWER STEERING (HYDRAULIC) PUMPS
If diagnosis has determined that complete disassembly is
necessary to determine the extent of the system failure, the
suggestion may be made to rebuild or replace the power steering pump.
Repair or replacement of the following components may be required if
performed as part of a power steering pump overhaul or rebuild service
to meet a minimum rebuild standard.
POWER STEERING (HYDRAULIC) PUMP INSPECTION









\









\









\









\









\









\









\


Condition Code Procedure
Attaching hardware bent . B ... Require repair or replacement
of bent part.
Attaching hardware
broken ................. A ... Require replacement of broken
part.
Attaching hardware
loose .................. A ... Require repair or replacement
of loose part.
Attaching hardware
missing ................ C .. Require replacement of missing
part.
Attaching hardware
threads damaged ........ A ... Require repair or replacement
of part with damaged threads.
Attaching hardware
threads stripped
(threads missing) ...... A ..... Require replacement of part
with stripped threads.
Belt alignment
incorrect .............. B .......... ( 1) Further inspection
required.
Belt cracked ............ 1 ............ Suggest replacement.
Belt frayed ............. 1 ............ Suggest replacement.
Belt missing ............ C ............ Require replacement.
Belt noisy .............. 2 .......... ( 2) Further inspection
required.
Belt plies separated .... A ............ Require replacement.

adjuster bent ......... A ............ (4) Require repair or
replacement of adjuster.
Torsion bar adjuster
seized ................ A .... ( 4) Require repair or replacement
of adjuster.
Torsion bar adjuster
threads damaged ....... A .... ( 4) Require repair or replacement
of part with damaged threads.
Torsion bar adjuster
threads stripped
(threads missing) ..... A ...... Require replacement of part
with stripped threads.
Vehicle suspension height
not within OEM
specifications ........ B ............ Require adjustment or
replacement.
( 1) - If vehicle is within manufacturer's height
specifications, no service is suggested or required.
( 2) - Some manufacturers require replacement under these
conditions.
( 3) - Check vehicle ride height. If ride height is OK, no
service is suggested or required.
( 4) - Only required if ride height needs to be adjusted.









\









\









\









\









\









\









\


STEEL POWER STEERING LINES
CAUTION: When replacing steel power steering lines, be sure to use
a replacement product that meets or exceeds OEM design
specifications.
STEEL POWER STEERING LINE INSPECTION









\









\









\









\









\









\









\


Condition Code Procedure
Attaching hardware
bent ................... B ... Require repair or replacement
of bent part.
Attaching hardware
broken ................. A ... Require replacement of broken
part.
Attaching hardware
loose .................. A ... Require repair or replacement
of loose part.
Attaching hardware
missing ................ C .. Require replacement of missing
part.
Attaching hardware
threads damaged ........ A ... Require repair or replacement
of part with damaged threads.
Attaching hardware
threads stripped
(threads missing) ...... A ..... Require replacement of part
with stripped threads.
Blocked ................. A .. Require repair or replacement.
Fitting incorrect
(such as compression
fitting) ............... B ............ Require replacement.
Flare type incorrect .... B ........... Required replacement.
Leaking ................. A ........... Require tightening or
replacement.
Line type incorrect ..... B ............ Require replacement.

piston rod movement. If dents don't restrict movement, no
service is suggested or required. Especially critical on
mono-tube dampers.
(2) - This condition can lead to damage of the piston rod,
which, in turn, causes premature piston rod seal wear.
( 3) - If noise is isolated to damper, suggest replacement.









\









\









\









\









\









\









\


STEERING GEARS (EXCEPT RACK AND PINION)
If diagnosis has determined that complete disassembly is
necessary to determine the extent of the system failure, the
suggestion may be made to rebuild or replace the power steering pump.
Repair or replacement of the following components may be required, if
performed as part of a power steering pump overhaul or rebuild service
to meet a minimum rebuild standard.
STEERING GEAR (EXCEPT RACK AND PINION) INSPECTION









\









\









\









\









\









\









\


Condition Code Procedure
Attaching hardware
broken ................. A .. Require replacement of broken
part.
Attaching hardware
loose .................. A .. Require repair or replacement
of loose part.
Attaching hardware
missing ................ C ......... Require replacement of
missing part.
Attaching hardware
threads damaged ........ A .. Require repair or replacement
of part with damaged threads.
Attaching hardware
threads stripped
(threads missing) ...... A .... Require replacement of part
with stripped threads.
Binding ................. A ... Require repair or replacement
Flex coupler binding .... A ... Require repair or replacement
of coupler.
Flex coupler loose ...... A ... Require repair or replacement
of coupler.
Flex coupler
missing parts .......... A ... Require repair or replacement
of coupler.
Flex coupler
soft/spongy ............ A . Require replacement of coupler.
Flex coupler torn ....... A . Require replacement of coupler.
Fluid contaminated ...... B ........ ( 1) Require flushing and
refilling of the system.
Gasket leaking .......... A ... Require repair or replacement
of gasket.
Housing leaking ......... A ............ Require replacement.
Hydraulic fittings
leaking ................ A ... Require repair or replacement
of fittings.
Inadequate power assist . A .......... ( 2) Further inspection
required.
See note below.
Lash exceeds
manufacturer's
specifications .......... B .. Require repair or replacement.
Seal leaking ............ A ... Require repair or replacement

of seal and/or mating part.
Splines damaged ......... A ... Require repair or replacement
of splines.
Splines stripped ........ A . Require replacement of splines.
Steering coupler
shield cracked ......... 2 ............ Suggest replacement.
Steering coupler
shield missing ......... C ............ Require replacement.
Threads damaged ......... A ... Require repair or replacement
of part with damaged threads.
Threads stripped
(threads missing) ...... A ..... Require replacement of part
with stripped threads.
U-joint binding ......... A ... Require repair or replacement
of joint.
U-joint loose ........... A ... Require repair or replacement
of joint.
Unequal power assist .... A .. Require repair or replacement.
(1) - Determine and correct source of contamination. OEM
specifications must be followed for fluid type.
( 2) - If steering gear is source of inadequate assist, require
repair or replacement.









\









\









\









\









\









\









\


STEERING GEARS - RACK AND PINION
If diagnosis has determined that complete disassembly is
necessary to determine the extent of the system failure, the
suggestion may be made to rebuild or replace the power steering pump.
Repair or replacement of the following components may be required, if
performed as part of a power steering pump overhaul or rebuild service
to meet a minimum rebuild standard.
STEERING GEARS - RACK AND PINION INSPECTION









\









\









\









\









\









\









\


Condition Code Procedure
Attaching hardware
broken ................. A ......... Require replacement of
broken part.
Attaching hardware
loose .................. A .. Require repair or replacement
of loose part.
Attaching hardware
missing ................ C ......... Require replacement of
missing part.
Attaching hardware
threads damaged ........ A .. Require repair or replacement
of part with damaged threads.
Attaching hardware
threads stripped
(threads missing) ...... A .... Require replacement of part
with stripped threads.
Balance tube blocked .... A .. Require repair or replacement
of balance tube.
Balance tube missing .... C .. Require replacement of balance
tube.
Balance tube restricted . A ... Require repair or replacement
of balance tube.
Bellows boot
clamp missing .......... C ... Require replacement of clamp.
Bellows boot cracked

(not through) .......... 2 .. Suggest replacement of bellows
boot.
Bellows boot missing .... C .. Require replacement of bellows
boot.
Bellows boot
not sealing ............ A ... Require repair or replacement
of bellows boot.
Bellows boot torn ....... A .. Require replacement of bellows
boot.
Bellows boot twisted
(from toe adjustment) .. B ................. Require repair.
Fitting leaking ......... A .. Require repair or replacement.
Fitting missing ......... A . Require replacement of fitting.
Fitting threads
damaged ................ A ... Require repair or replacement
of part with damaged threads.
Fitting threads stripped
(threads missing) ...... A ..... Require replacement of part
with stripped threads.
Flex coupler binding .... A ... Require repair or replacement
of coupler.
Flex coupler loose ...... A ... Require repair or replacement
of coupler.
Flex coupler
missing parts .......... A ... Require repair or replacement
of coupler.
Flex coupler
soft/spongy ............ A . Require replacement of coupler.
Flex coupler torn ....... A . Require replacement of coupler.
Fluid contaminated ...... B ........ (1) Require flushing and
refilling of the system.
Gasket leaking .......... A .. Require repair or replacement.
Hard steering on cold
start-up ............... 1 ........... ( 2) Suggest repair or
replacement.
Housing cracked,
affecting structural
integrity .............. B ............ Require replacement.
Housing leaking ......... A ............ Require replacement.
Inadequate power assist . A .......... ( 3) Further inspection
required.
Lash exceeds
manufacturer's
specifications ......... B .. Require repair or replacement.
Seal leaking ............ A .. Require repair or replacement.
Splines damaged ......... A .. Require repair or replacement.
Splines stripped
(splines missing) ...... A ............ Require replacement.
Steel line blocked ...... A ... Require repair or replacement
of line.
Steel line leaking ...... A ... Require repair or replacement
of line.
Steel line missing ...... C .... Require replacement of line.
Steel line restricted ... A ... Require repair or replacement
of line.
Steering coupler shield
cracked ................ 2 ............ Suggest replacement.
Steering coupler shield
missing ................ C ............ Require replacement.
Steering coupler shield
torn ................... 2 ............ Suggest replacement.
Threads damaged ......... A ... Require repair or replacement
of part with damaged threads.