Bradco 511 Operator's Manual download pdf (Page 41)

TROUBLESHOOTING

PROBLEM POSSIBLE CAUSE REMEDY

Backhoe fails to lift or Low oil supply Add oil

swing

Improper hose hookup Check hydraulic dia-

gram; reinstall properly

Worn control valve Replace section

section

Pump damaged or Replace pump

worn

Broken hydraulic line Check for leaks and re-

place line

Jammed swing linkage Remove interference

Bent cylinder rod Replace or repair

cylinder

Swing speed control Open swing speed

completely closed control valve

Backhoe lifting or swing- Cold oil Warm oil with engine at

ing too slowly idle speed

Engine speed too slow Open throttle

Oil leaking past control Replace or repair worn

valve section

Oil too heavy Use recommended oil

Pump damaged or Replace or repair pump

worn

Oil leaking past Replace packings

cylinder packings

Dirty oil filter Replace filter

Faulty relief valve Clean or replace

Incorrect restrictors in Check restrictor orifice

valve size with those shown

on valve assembly page

6828

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Bradco 511 Operator's Manual Page 41