Bradco 509 Manual del operador descargar pdf (Pagina 38)

TROUBLESHOOTING

6828 8-23-11-4

PROBLEM POSSIBLE CAUSE REMEDY

Backhoe fails to lift or Low oil supply Add oil

swing

Improper hose hookup Check hydraulic diagram; reinstall

properly

Worn valve section (Gresen) Replace section

Pump damaged or worn Replace pump

Broken hydraulic line Check for leaks and replace line

Jammed swing linkage Remove interference

Bent cylinder rod Replace or repair cylinder

Swing speed control Open swing speed control valve

completely closed

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

ing too slowly speed

Engine speed too slow Open throttle

Oil leaking past control valve Replace or repair worn section

Oil too heavy Use recommended oil

Pump damaged or worn Replace or repair pump

Oil leaking past cylinder Replace packings

packings

 Dirtyoillter Replacelter

Faulty relief valve Clean or replace

 Incorrectrestrictorsinvalve Checkrestrictororicesizewith

those shown on valve assembly

page

75475

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Bradco 509 Manual del operador Pagina 38