Section H. Possible malfunctions and remedies
Belarus – 90/92 Operating manual
113
Continuation of table H-1
MALFUNCTION, SYMPTOM
REMEDY
HYDRAULIC LIFT LINKAGE
No lift of mounting or load-carrying capacity
dropped dramatically.
1. Low oil level in the tank – add oil to level.
2. Air leak on pump admission line – eliminate air
leak (oil foaming).
3. Hanging of overflow valve of distributor (take
off valve parts, wash and put them in place).
Drop of the load-carrying capacity during oil
warming up. During cooling-down the load-
carrying capacity recovers.
Wearing or failure of oil pump – replace pump.
High oil warming in hydraulic system
1. Insufficient quantity of oil in hydraulic system
body (add oil to the mark “
П
”).
2. Handle of distributor is in position «lift» (return
handle in position «neutral», define and eliminate
the cause of jamming).
3. Pump lost productivity (replace pump).
Spontaneous implement dropping
1. Oil leak on gaskets of piston of hydro cylinder
(replace gasket).
2. Pilot-operated check valve of distributor is leaky
(wash or replace pilot-operated check valve).
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