LUBRICATION
Check the oil level annually by unscrewing oil fill plug (FIG 10).
When changing or adding oil, fill the reservoir through the top plug
hole in the reservoir to 80% capacity with hydraulic jack oil. Do not
overfill.
A- Filler Plug
B- Drain Plug
C- Bleeder Plug
D- Grease Fitting
After filling and re-installing filler plug, bleed the pump.
• Pump handle to build up pressure in the reservoir.
• Loosen bleeder plug until fluid flows from bleeder plug.
• Tighten bleeder plug.
• Repeat process until no air remains in the system.
There is one grease fitting located on the black cross bar just
under front of reservoir. This fitting should be greased on a
semi-annual basis (FIG 11 “D”).
14
13
FIG 10
FIG 11
A
B
C
D
SERVICING
TROUBLESHOOTING
SPECIFICATIONS
• Model # PJ20
• Stock # 779766
• Height- 45.13”
• Width- 20.5”
• Depth- 63”
• Weight- 172lbs
• Capacity- 6,600lbs
• Model # PJ27
• Stock # 779765
• Height- 45.13”
• Width- 27”
• Depth- 63”
• Weight- 196lbs
• Capacity- 6,600lbs
TROUBLE
PROBABLE CAUSE
REMEDY
Low oil level in reservoir.
Make sure there is no oil leakage from valve,
and add oil.
Steel ball not seated in hydraulic unit.
Place the lever in the down position and
pump the handle repeatedly.
Worn U-packing in ram cylinder
Consult authorized service facility.
Steel ball not seated in hydraulic unit. Bleed the pump.
Worn seal in ram cylinder.
Have seal(s) replaced.
Release valve not seated properly.
Bleed the pump.
Release valve not adjusted properly.
Reload truck within load capacity and adjust
valve by pressure adjustment screw.
Oil leakage from each valve.
Tighten plug of each valve.
Relief cam or chain element broken. Replace affected element.
Relief cam nut out of adjustment.
Refer to "Adjusting Relief Cam."
Broken fork rods and linkage.
Inspect linkages for breaks or cracks. Replace
elements as needed
Lever does not set at Up-Load.
Relief cam nut out of adjustment.
Refer to "Adjusting Relief Cam."
Truck doesn't roll smoothly or
evenly.
Wheels have debris embedded, or
out of round due to wear.
Inspect and remove debris. If worn, replace
wheels. Note: Always replace wheels in
pairs.
Hydraulic unit does not lift.
Once lifted, truck lowers by itself.
Fork does not lower.
MAINTENANCE
IMPORTANT: Repairs and seal ring replacements should only be
performed by qualified personnel at authorized Sumner Repair
Facilities.
Any disassembly of the Sumner Pallet Truck should be done by
authorized and qualified service personnel. Contact Sumner
customer service for a list of authorized repair facilities.
TROUBLESHOOTING
