Hydraulic lift linkage

MALFUNCTION, SYMPTOM

HYDRAULIC LIFT LINKAGE

Continuation of table H-1

REMEDY

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 loadcarrying 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).