maintenance CITROEN RELAY 2020 Handbook (in English)

147
Special features
10Dimensions
This adaptation is available only on L2 single
cab; refer to the table below for the specifications
of the tipper truck.
Tipper truck (in mm)
Useable length 3,200
Overall length 3,248
Useable width 2,000
Overall width 2,100
Height of boards 350
Weight of the conversion (in
kg) 550
For the L2 chassis cab specifications,
refer to the Dimensions section of the
platform version.
Weights and towed loads
(kg)
The braked trailer weight with load transfer can
be increased, provided that the equivalent of this
load is removed from the vehicle so as not to
exceed the GTW. Warning! Towing using a lightly
loaded vehicle can adversely affect roadholding.
The kerb weight is equal to the unladen weight +
driver (75 kg) + tank full to 90%.


Before towing a trailer, check that:
– the vertical force exerted on the towball is
not greater than the value (S) indicated on the
trailer’s tare plate;
– the Towed Weight (TW) is less than the value
indicated on the trailer’s tare plate and the Gross Vehicle Weight (GVW) does not exceed the
value indicated on the vehicle’s tare plate.
– in the case of a self-supporting trailer, the
Gross Train Weight (GTW) must not exceed the
value indicated on the vehicle's tare plate.
Hydraulic system
These precautions are mandatory for any
work on the hydraulic system.


– When carrying out maintenance work under
the tipper body, place the tipper body in the
safety position secured with its stay (position
indicated by a red arrow under the back of the
tipper body),

148
Special features

– Never work under a tipper body that is not
supported,
– Switch off the power supply to the electro-
hydraulic unit using the circuit breaker,
– Vehicle stationary, engine off.
For safety reasons, we very strongly
advise against doing anything under the
tipper body while it is being operated or while
it is being serviced.
Maintenance
Reservoir
Regularly check and top up the engine oil level.
Change the oil once a year. If the oil contains
water, change it.
Regularly check the condition of the hose and
ensure the hydraulic system is properly sealed.
Pump and motor
No servicing required. The rolling elements are
permanently lubricated and the bearings are
lubricated by the pumped oil.
Lubrication
The pins of the tipper truck and the ram do not
contain lubricant. Regularly lubricate the hinges
and the grab handles of the side boards as well
as the retaining hooks of the rear board.
Sub-frame and tipper truck
For maximum service life, you are advised to
maintain your tipper truck by regularly washing it
using a power washer.
Carry out any required paint touch-ups quickly to
prevent the spread of rust.
After 8 months of use, check the tightening torque of the connection
between the chassis and the underbody (in
accordance with the manufacturer's
bodybuilding recommendations).
Cleaning the slide valve
â–º Loosen cap 244A, taking care with the ball
and retrieving it.
â–º Using a wide screwdriver, unscrew the banjo
bolt/piston assembly.
â–º Check that the piston slides freely and
remove any foreign bodies. Use a magnet to
remove any metal filings.
â–º Refit the assembly and make sure that the
piston slides freely. Retain the ball with a little
grease on the cap for refitting.
â–º Bleed the hydraulic unit.
Bleeding the hydraulic unit
â–º Unscrew hexagonal cap 257.
â–º Loosen internal screw 587 by half a turn,
using a 6 mm hex key.
â–º Operate the unit for a few seconds by
pressing the raise button.
The tipper truck does not rise or rises very
slowly. When the oil exits through this opening,
the unit is bled.
â–º Retighten screw 587 and replace cap 257.
Check that the tipper truck lowers correctly.
Detailed diagram of the UD2386 hydraulic
unit


Diagnostics
Symptoms ElectricHydraulic Verification/Check
The hydraulic unit does not work. XPower harness and unit relay.
X Control harness (control unit).
X Circuit-breaker.
Very noisy unit, rises slowly. XSuction strainer clogged or crushed at the bottom of the tank.
Very noisy new unit, rises quickly. XPump alignment, change the unit.
The ram lowers by itself. XLowering valve crushed or blocked.
The ram does not lower. XYes, check the slide valve and bleed.
Refer to the "Maintenance" section.
X No, check the coil and the electrical connections of the valve.
X No, replace the solenoid valve.
X No, check the alignment of the ram.
The unit works but its pressure does
not increase. X
Slide valve jammed if no solenoid valve on the unit.
Refer to the "Maintenance" section.
X Pressure relief device, setting, dirt.
X Pump seal out of service.
X Motor/pump coupling.
X Pump loose from its support.
The hydraulic unit does not work. XSolenoid valve blocked, replace it or retighten the nut behind the strainer .
The control unit does not work. XCheck connection and contacts.
Emulsion in the tank. XIncorrectly positioned return pipe.
X Insufficient oil level.

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Special features
10Diagnostics
SymptomsElectricHydraulic Verification/Check
The hydraulic unit does not work. XPower harness and unit relay.
X Control harness (control unit).
X Circuit-breaker.
Very noisy unit, rises slowly. XSuction strainer clogged or crushed at the bottom of the tank.
Very noisy new unit, rises quickly. XPump alignment, change the unit.
The ram lowers by itself. XLowering valve crushed or blocked.
The ram does not lower. XYes, check the slide valve and bleed.
Refer to the "Maintenance" section.
X No, check the coil and the electrical connections of the valve.
X No, replace the solenoid valve.
X No, check the alignment of the ram.
The unit works but its pressure does
not increase. X
Slide valve jammed if no solenoid valve on the unit.
Refer to the "Maintenance" section.
X Pressure relief device, setting, dirt.
X Pump seal out of service.
X Motor/pump coupling.
X Pump loose from its support.
The hydraulic unit does not work. XSolenoid valve blocked, replace it or retighten the nut behind the strainer .
The control unit does not work. XCheck connection and contacts.
Emulsion in the tank. XIncorrectly positioned return pipe.
X Insufficient oil level.

178
Alphabetical index
Low fuel level 90
Lumbar 27
M
Maintenance, routine 74, 98
Manoeuvring aids (recommendations) 73
Mat 74
Menu 13, 160–161, 163, 166, 168
Menus (audio) 160–161
Mirrors, door 31, 83
O
Oil change 96
Oil consumption 96
OIl, engine 96–98
On-board tools 105–110
Opening the bonnet 94
Overhead storage 38–41
P
Pads, brake 99
Parking brake 68, 100
Player, USB 152–153, 161–162
Port, USB 152–153, 161–162
Pressures, tyres 100
Pre-tensioning seat belts 56
Protecting children 57–59
R
Radar (warnings) 74
Radio 152, 160, 162
Radio, digital (Digital Audio
Broadcasting - DAB) 161
Range, AdBlue® 12, 98
Recovery 122
Regeneration of the particle filter 99
Remote control 20, 66
Replacing bulbs 111
Replacing the air filter 98
Replacing the oil filter 99
Replacing the passenger compartment
filter 98
Resetting the service indicator 10–11
Reversing camera 74
S
Safety, children 57–59
Screen, colour 160
Screen menu map 160–161, 163, 166, 168
Screenwash fluid 97–98
SCR (Selective Catalytic Reduction) 101
Seat belts 55–56
Seat belts, rear 56
Seats, heated 28
Seats, rear 59
Sensors (warnings) 74
Service indicator 10–11
Servicing 10–11, 98
Settings, equipment 13, 18
Sidelamps 46
Snow chains 91
Socket, auxiliary 153, 162
Socket, Jack 153, 162
Sockets, auxiliary 38–41
Speed limiter 76–77
Speed limit recognition 75–76
Speedometer 74
Stability control (ESC) 52
Stability control (ESP) 53
Starting a Diesel engine 91
Station, radio 152, 160
Steering mounted controls, audio 151, 159
Steering wheel adjustment 30
Stop & Start 32, 38, 49, 56, 69–70, 94, 98, 122
Storage 38–41
Sunshine sensor 31
T
Tables of engines 124
Table, writing 38–40
Tank, fuel 90
Technical data 124
Telephone 154, 166–168
Temperature, coolant 11