Lift Pump and Motor Repair 2000 SRM 1025
6. Remove relief valve and check valve from pump.
See Relief Valve and Check Valve, Remove.
7. Remove the coupling.
8. Use the following procedure that applies to your
lift truck:
a. Remove main valve block from pump hous-
ing.
b. Remove plugs from auxiliary ports.
ASSEMBLE
Assemble Pump
For the following procedures, refer to Figure 5 for
W30/40ZA lift trucks, Figure 6 for W20/30ZR lift
trucks, and Figure 7 for W25/30/40ZC lift trucks.
1. Position pump mounting bracket to pump and
install two capscrews and lockwashers to secure.
Torque the capscrews to 20 N•m (15 lbf ft). See
Figure 4.
2. Install tubes and related items to bottom of pump
as removed.
3. Secure reservoir adaptor plate to pump by in-
stalling attaching hardware.
4. Use the following procedure that applies to your
lift truck:
a. Install auxiliary valve block to pump using
fourscrewsandtorqueto22N•m(16lbfft).
b. Install valve block to pump using four screws
and torque to 22 N•m (16 lbf ft).
c. Install the main valve block to the pump
using two fasteners and torque to 22 N•m
(16 lbf ft).
5. Install the relief valve and check valve. See Re-
lief Valve and Check Valve, Install.
6. Use the following procedure that applies to your
lift truck:
a. Install main valve block to pump housing and
torque the capscrews to 22 N•m (16 lbf ft).
b. Install plugs into auxiliary ports in pump
housing and torque to 22 N•m (16 lbf ft).
Install Pump Motor
1. Lubricate the motor output shaft and the pump
input shaft with a light coating of multi - purpose
#2 grease with 2% to 4% molybdenum disulfide.
2. Install the coupling on the pump shaft.
3. Align the slot in the motor shaft with the cou-
pling. Lower the motor onto the pump, rotating
the body as necessary to engage the coupling and
then align the capscrews.
4. Tighten the capscrews to 8 N•m (71 lbf in).
Install Reservoir to Pump
1. Place reservoir in an upright position on the floor.
NOTE: The reservoir may be filled at this point or it
may be filled after the lift pump and motor assembly
has been installed.
2. Fill reservoir with hydraulic oil to proper level.
See Table 1.
3. Install the O-ring seal on the pump assembly. If
necessary, use a small amount of grease to hold
the O-ring seal in position.
4. Position the lift pump and motor assembly onto
the reservoir.
5. Use the following procedure that applies to the
hydraulic reservoir for your lift truck:
a. Install the clamp to the reservoir and adaptor
using the screw to tighten.
b. Install the clamps to the reservoir and the
adaptor and install the four capscrews to se-
cure the clamps.
INSTALL LIFT PUMP AND MOTOR
ASSEMBLY
1. Install hydraulic lift pump and motor assembly
in the lift truck and secure with the two nuts and
washers. Torque the nuts to 15 N•m (11 lbf ft).
2. Connect the control wiring plugs to the coils as
noted on tags.
3. Install the locking screws into the coil plugs.
4. Install the hydraulic hoses to the lift pump and
motor assembly as noted on tags.
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