DAF CF65, CF75, CF85 Series . Manual — part 1069
©
200424
5-1
Disassembly and assembly
HYDRAULIC LIFTING GEAR
ΧΦ65/75/85 series
8
9
5. DISASSEMBLY AND ASSEMBLY
5.1 DISASSEMBLY AND ASSEMBLY, PUMP UNIT
Disassembling the pump unit
1.
Remove the pump unit from the vehicle, see
the chapter "Removal and installation".
2.
Let the oil run from the reservoir.
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48
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A8 00 277
HYDRAULIC LIFTING GEAR
5-2
©
200424
Disassembly and assembly
9
ΧΦ65/75/85 series
8
3.
Clean the entire pump unit and the
surroundings before disassembly. Work in
very clean conditions.
4.
Remove the pressure relief valve, the 4/2
valve and the 2/2 valve, see chapter
"Removal and installation".
5.
The built-in non-return valve (28) is very
difficult to remove from the valve block
because a very strong locking and sealing
compound has been applied to the screw
thread of the plug (29). Leave the non-return
valve in the valve block, if it is not necessary
to remove it.
6.
Remove the pressure switch (40).
7.
Loosen the clamping strip (19) and take the
reservoir (23) from the valve block (27).
8.
If necessary, remove the return lines (35)
and (45) from the valve block (27). The lines
are clamped to the couplings (36) and (44).
9.
Loosen the hose clamp (48) and take the
suction filter (50) out of the coupling (47).
10. Mark the position of the pump (32) relative to
the valve block (27) to facilitate installing the
pump. Remove the two attachment bolts (34)
at the back of the pump and remove the
pump (32) from the valve block (27).
11. Mark the position of the motor (24) relative to
the valve block (27). Remove the two
hexagonal socket screws (31) and remove
the motor from the valve block.
12. Remove the coupling disc (28) from the
valve block.
Assembling the pump unit
1.
Check the components for signs of wear
and/or damage.
Check the suction pipe carefully.
When installing the parts, use new gaskets
and/or O-rings. Apply some grease to the O-
rings prior to installation.
2.
Apply plenty of oil to the coupling disc (26)
and install the coupling disc in the valve
block (27). Make sure that the groove for the
motor is pointing towards the motor side.
3.
Install the motor (24) on the valve block (27).
Tighten the attachment bolts (31) to the
specified torque. See "Technical data".
©
200424
5-3
Disassembly and assembly
HYDRAULIC LIFTING GEAR
ΧΦ65/75/85 series
8
9
4.
Install the pump (32) on the valve block (27).
Make sure that the pump drive shaft
engages the coupling disc (26). Check
whether the front of the pump is flush against
the valve block before tightening the
attachment nuts (34). Tighten the
attachment bolts to the specified tightening
torque, see "Technical data".
5.
Install the pressure relief valve, the 4/2 valve
and the 2/2 valve, see chapter "Removal and
installation".
6.
Install the pressure switch (40).
7.
Connect the oil return lines (35) and (45).
8.
Fit the filter (50). The cam on the filter must
fall into the groove of the pump cover.
Tighten hose clamp (48) securely.
9.
Install the O-ring (20) and the reservoir (23).
The filler opening of the reservoir (23) is on
the side with the valves (40) and (43).
Tighten the reservoir using the clamping
strip (19).
10. Plug the line connections.
11. After installation of the pump unit in the
vehicle, the operation and adjustment of the
valves and the pressure switch should be
checked, see chapter "Inspection and
adjustment".
Check for external leakage.
HYDRAULIC LIFTING GEAR
5-4
©
200424
Disassembly and assembly
9
ΧΦ65/75/85 series
8
5.2 DISASSEMBLY AND ASSEMBLY, 2/2 SOLENOID VALVE
Disassemble the valve only to check
and/or to clean the internals. The
internal parts cannot be obtained
separately. In case of a fault, the
valve as a whole should be replaced.
Repair and maintenance activities
should be carried out in very clean
conditions as even the smallest
impurity can cause internal leakage
or can result in jamming of the valve.
Disassembling the 2/2 solenoid valve
1.
Remove the valve from the pump, see the
chapter "Removal and installation".
2.
Clamp the valve casing (1) with the
hexagonal head in the vice and remove the
holder (8).
3.
Remove the holder (8) with the valve (7) from
the valve casing (1). Make sure that the
adjusting rings (3) are kept together.
4.
Remove the spring (6) from the magnet-
core (4) pin.
5.
Remove the magnet core (4) with the bush
(5) from the valve casing (1). Note down the
distance of the bush (5).
Assembling the 2/2 solenoid valve
1.
Check the sealing surfaces of the valve (7),
the holder (8) and the magnet-core (4) pin.
2.
Check the freedom of movement of the
valve (7) in the holder (8).
3.
Check the freedom of movement of the pin in
the magnet core (4).
4.
Replace the O-ring (2) of the valve core (1)
and the O-ring (9) of the holder (8). Apply a
layer of grease to the O-rings.
5.
Install the magnet core (4) with the bush (5)
into the valve casing (1). Make sure that the
bush (5) is fitted in its original position.
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A8 00 254
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