8
Section VI – Overhaul
A. Service Tools 20.
Standard Tools
1. One torque wrench with short extension and sockets.
Select appropriate torque wrench according to cover
screw specifications noted in Table 4.
2. One medium size screw driver.
3. One torque screw driver (125 lb. in. maximum).
4. One internal retaining ring pliers.
5. Hydraulic oil lubricant or equivalent (SAE 10W motor
oil).
NOTE
In addition to the above tools, an arbor press may
be required to service the shaft bearing. A small
ball peen hammer and a center punch may also be
helpful during removal of the shaft key.
Special Tools
A shaft seal driver (Figure 5) is the only special tool required
for overhaul.
Model
25V
35V
45V
A
2.045
.001
2.832
.001
3.145
.001
B
1.683
.001
1.997
.001
2.371
.001
C
1.468
.001
1.758
.001
2.281
.001
D
1.343
.001
1.687
.001
1.906
.001
E
0.250
0.250
.437
Dimensions
A
B
C
D
Note: All Dimensions are in inches
1/16
15
_
0.125
0.500
E
4.00
Break sharp
edges and polish
Figure 5. Shaft Seal Driver
B. Unit Removal
WARNING
Turn off all electrical power and relieve hydraulic
pressure. Lower all vertical cylinders. Block any
load whose movement could generate pressure.
1. Close off hydraulic oil source to pump inlet if an
overhead reservoir is used.
2. Remove the unit from the system.
3. Cap all system and unit openings to prevent entry of
dirt or moisture.
C. Disassembly
The index numbers on Figure 8 are in order of the
disassembly sequence.
1. Thoroughly clean pump exterior.
2. Use a prick punch and mark the position of cover (4)
with respect to the body (29). Mark position of the flange with
respect to cover on VT models.
3. Remove the two screws (1) and remove the
mounting flange from the pump.
4. Remove the key (2) from the shaft (26).
NOTE
The following step (5) pertains to 25VT, 35VT or
45VT thru-shaft models only. Refer to Figure 8.
5. Disassemble (VT) thru-shaft parts as follows:
a. Remove four screws (5) from adapter flange (6).
Remove the adapter flange from inlet cover (4).
b. Remove and discard “O” rings (7) from both sides
of adapter flange.
c. Remove spline coupling (8) from end of shaft
(20). Do not remove retaining ring (9) from coupling.
d. Remove four screws (10) from inlet cover (4).
Remove the inlet cover from body (29).
6.Remove the four screws (3) from cover (4) and
remove cover (*5V models only).
7.Remove cartridge kit (11) from shaft (26).
8.Remove seals (12 through 15) from cartridge kit (11).
Proceed to disassemble cartridge kit (11) according to
number sequence.
9.Pry under one coil and remove the spirolox ring (23)
out of the body (29). See Figure 6.
