Generac Power Systems 2500 Diagnostic Repair Manual page 12

Section 1 Pump Troubleshooting
3. Place the piston guide back into the pump and
push firmly down until the piston guide is seated.
Figure 1-17 shows the piston guide not seated and
Figure 1-18shows the piston guide seated.
Figure 1-17. Piston Guide NOT Seated
Figure 1-18. Piston Guide Seated
4. When reassembling the pump head to the drive
end, slide the pump on to the piston shafts evenly
and slowly. Do not force it.
5. Once the pump head and the drive end are seated
together reinstall the 8 bolts holding the pump head
to the drive motor. Torque the bolts to 92 in-lbs
(10.3 Nm).
6. Figure 1-19 shows the sequence of tightening.
5
8
Figure 1-19. Pump Fasteners Tightening Sequence (8)
10
002936
002937
3 1
2 4 6
002938
002936
002937
7
002938
Diagnostic Repair Manual