9
(1) Transmission failure causes and troubleshooting methods
fault
cause
maintenance
Decline in efficiency
1.
1. The friction plate is stuck or worn.
Check for gluing, uneven contact or
warping of the friction plate.
2. Bearing damage.
Replace the bearing
3. Check whether the lubricating oil road
is blocked.
dredge
The spill
1. The gasket is damaged.
Replace gasket
2. Rubber parts are aged or damaged.
Replacement parts
3. Parts are damaged and cracked.
replace
(1) Multi-way valve failure causes and troubleshooting methods
fault
cause
maintenance
External leakage
The sealing part of the lip is worn
Replace seal ring
The valve stem seal is damaged
Replace stem or disc sub assembly
The sealing part of the lip is embedded
with foreign matter such as paint and
dust
Clean the paint and other foreign
matters embedded in the lip sealing
part, pay attention to not damage
the valve stem and sealing surface
O-ring damaged (cut ring)
Replace the O-ring seal
The sealing ring between valve discs is
aged and deformed
Replace the new sealing ring
There is scratch (new valve) or foreign
matter in the sealing plane of valve disc
Remove foreign matter or replace
valve disc
Valve body hole and sealing ring slot
hole different (new valve)
Replace the valve plates
Back pressure exceeds allowable value
Check the loop and lower the return
oil pressure to the specified value
The bolts between plates are not evenly
stressed or tightened
Tighten the stud bolts with specified
torque
Stem cannot be reset
The control mechanism is not flexible
Check the control lever
The stem was jammed with dirt
Clean valves, fuel tanks and
pipelines
The return spring is deformed or broken
Remove the back cover for
inspection and replace the spring
Stem deformation caused by external
Refit stem or replace valve sub
