84
Cylinder Head
NOTE:
Some pump models feature a BRASS
cylinder head, some an ALUMINUM cylinder head.
To remove the pump cylinder head, refer to Figure 7.12 and
proceed as follows:
1. Remove six (6) M8-1.25 socket head cap screws and M8
ribbed lock washers.
2. Remove the cylinder head and head gasket.
To disassemble the head and remove the check valves, refer
to Figures 7.13 to 7.15 and proceed as follows:
A special puller tool (included in
Generac Portable
Products®
kit number SRV95523) is used to remove
the inlet and outlet check valves. As shown in Figure 7.13,
the tool consists of a threaded (7/16”-20) tee handle
arrangement.
Three (3) inlet and three (3) outlet check valves are
threaded (7/16”-20) to accept the threaded tee handle.
To remove the three (3) inlet (low pressure) check valves,
refer to Figure 7.14 and proceed as follows:
1. Insert the ‘T’ handle through the puller tool thimble
(item 1).
2. Turn the puller upper tee handle clockwise until the
puller threads have engaged the check valve threads.
NOTE:
Do not turn the tool in too far. An
engagement of 2 or 3 threads is sufficient.
3. With the puller threads engaged in the check valve
threads, hold the upper ‘T’ handle and keep it from
turning while you turn the tool lower ‘T’ handle
clockwise.
4. Repeat steps 2 and 3 for the other inlet check valves.
Section 7 • Large Frame Pump
Portable Pressure Washer Familiarization and Troubleshooting Guide
Figure 7.12 — Pump Head Removal
Item
Name
1
Spacer plate
2
Head gasket
3
Thermal bypass
4
Plug
5
Cylinder head
6
Lock washer
7
Socket head cap screw
8
Inlet water connector/filter
Figure 7.13 — Check Valve Puller
Figure 7.14 — Inlet Check Valve Removal
Item
Name
1
Puller tool
2
O-ring
3
Check valve
4
Backup ring
