178 STARTING AND OPERATINGComfort Tire Pressures in PSI (kPa)For reasons of comfort, we recommend setting the tire
pressures according to the table below, depending on
axle loads, on longer journeys with an unloaded or
only partially loaded vehicle.
Comfort Tire Pressures in PSI (kPa)
Front Axle
Size Application Axle loads in lbs (kg), see
type plate
2,315
(1,050) 2,646
1,200) 2,976
(1,350) 3,219
(1,460)
195/70 R 15 C
104 / 102 R Single
36
(250) 40
(275) 47
(325) 51
(350)
225/70 R 15 C
112 / 110 R
(115 N) Single
33
(225) 36
(250) 36
(250) 36
(250)
WARNING!
Correct the tire pressures before loading the
vehicle fully. If the tire pressure is too low driving
safety and tire mileage are decreased.
Rear Axle
Size Appli-
cationAxle loads in lbs (kg), see type plate1,764
(800) 2,205
(1,000) 2,646
(1,200) 3,307
(1,500) 3,748
(1,700)
195/70 R 15 C
104 / 102 R
Double
–
36
(250) –––
225/70 R 15 C
112 / 110 R
(115 N) Single
33
(225)
33
(225) 36
(250) 43
(300) 47
(325)
208 WHAT TO DO IN EMERGENCIESCentering wheels with wheel bolts
If dual assemblies are used, before placement the inner wheel should be inspected to ensure that all
ball bearing rings are in proper position.
Install the wheel and snug the wheel bolts.
Slightly tighten wheel bolts.
Slowly open jack release va lve to lower vehicle until
tire is resting on ground.
Tighten the wheel bolts in a crosswise pattern to the specified torque with a torque wrench.
Tightening torque for 8,550 lbs (3,880 kgs)
(vehicle type 2500 C/HC/SHC):
Steel wheel – 177 lbf.ft ±7 lbf.ft (240 N.m ±10 N.m)
Light alloy wheel – 138 lbf.ft ±14 lbf.ft
(190 N.m ±20 N.m) Tightening torque for 9,990 lbs (4,530 kgs)
(vehicle type 3500 C/HC/SHC):
Steel wheel – 138lbf.ft ±14lbf.ft (190N.m ±20N.m)
Remove jack and stow it in the vehicle tool kit.
Check the tire pressure.
Re-tighten the wheel bolts to the specified torque with a torque wrench after a distance of 30 miles
(about 50 km).
WARNING!
Do not tighten the wheel bolts and wheel nuts
completely while the vehicle is still jacked up.
The vehicle could tip.
WARNING!
After changing a wheel, you must, for safety reasons, have the specified tightening torque checked. The
wheels could otherwise work loose.
check the tire pressure and correct it if necessary.
retighten the wheel bolts and wheel nuts to the specified tightening torque once the vehicle has
been driven for 30 miles (50 km).
have a reversed direction of tire rotation corrected as soon as possible at a qualified specialist
workshop. The vehicle handling characteristics
could otherwise be affected.
