DAF CF65, CF75, CF85 Series . Manual — part 144

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3-1

Inspection and adjustment

CAB TILTING MECHANISM

ΧΦ65/75/85 series

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6

3. INSPECTION AND ADJUSTMENT

3.1 INSPECTING TILTING MECHANISM

1.

Check all pipes and connections for any
leakage.

2.

Check the cab tilting pump for leaks.

3.

Check the lifting cylinder and the cab locks
for leaks.

4.

Check that the pistons of the cab locks can
move in and out freely.

Note:
A defective cab tilting mechanism is often the
result of contaminated oil.

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CAB TILTING MECHANISM

3-2

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Inspection and adjustment

6

ΧΦ65/75/85 series

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3.2 INSPECTION AND ADJUSTMENT, PRESSURE LIMITING VALVE OF CAB

TILTING PUMP

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Always use a pressure gauge for
inspection and adjustment of the
pressure limiting valve. Too high a
pressure may damage the tilting
mechanism and give rise to
extremely dangerous situations.

Checking pressure limiting valve of cab tilting
pump
1.

Remove the pipes from the pump and plug
the connection (D) on the pump with a
dummy nipple.

2.

Connect a pressure gauge with a range of no
less than 600 bar to connection (B).

3.

Bleed the pressure gauge hose.

4.

Check the oil level in the pump.

Note:
Check the oil level. Never fill the oil reservoir
when the cab is tilted.

5.

Put the two-way valve of the cab tilting pump
in the "tilt forward" position. Operate the
pump. If the measured pressure does not
match the specified pressure, see "Technical
data", the pressure limiting valve must be
adjusted.

Note:
The pressure will fall slowly the moment
pumping is stopped; this is normal. A fast
pressure drop would indicate a defective
two-way valve.

6.

Remove the pressure gauge and dummy
nipples and connect the pipes.

7.

Check the oil level in the pump.

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Too high a pressure may cause the
end stop to be pushed out of the
lifting cylinder, causing the cab to tilt
forward off the chassis.

Note:
The pressure relief valve is located in the plunger
of the cab tilting pump and can be adjusted via
the filler opening (A).

A

C

B

D

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200346

3-3

Inspection and adjustment

CAB TILTING MECHANISM

ΧΦ65/75/85 series

1

6

Adjusting pressure limiting valve of cab tilting
pump
1.

Plug connection (D) on the pump with a
dummy nipple.

2.

Connect a pressure gauge with a range of no
less than 600 bar to connection (B).

3.

Remove filler plug (A) and fill the reservoir
with the specified hydraulic fluid, see "Fluids
and lubricants" specification.

Note:
Never fill the reservoir when the cab is tilted.

4.

Bleed the pressure gauge hose. Put the
lifting cylinder cock into the "tilt forward"
position. Operate the pump. If the pressure is
less than the specified pressure (bar), the
pressure relief valve should be adjusted.
(Remember that the pressure will drop
somewhat as soon as you stop pumping.)

5.

Remove filler plug (A) and use a suitable
screwdriver to set the pressure relief valve in
the plunger to the specified pressure see
"Technical data".

6.

Remove the pressure gauge and dummy
nipple. Connect the pipes.

7.

Check the oil level in the pump.

A

C

B

D

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CAB TILTING MECHANISM

3-4

©

200346

Inspection and adjustment

6

ΧΦ65/75/85 series

1