Bradco CONTRACTOR 408A BACKHOE, Operator'S & Parts Manual, Page: 40 / 142

PROBLEM POSSIBLE CAUSE REMEDY
Backhoe fails to hold up Broken or leaking lines Replace broken hose
load and check for leaks
Dirty oil Drain and refill oil,
replace filter
Oil leaking past cylin- Replace packings
der packings
Oil leaking past control Replace or repair worn
valve section
Faulty relief valve Clean or replace
Oil heating Dirty oil Drain and refill oil,
replace filter
Air entering suction line Eliminate leaks
to pump
Partially plugged inlet Clean filter element
filter
Control valve held Return control to
open too long neutral position when
not in use
Worn pump Replace pump
Relief valve set too low Set valve correctly
Oil too light in hot Use recommended oil
weather
Engine running too fast Reduce throttle
Damaged oil lines Replace damaged lines
Poor operating tech- Learn smooth operating
nique causing excess- methods
ive oil flow over relief
valve
3912
1-11-02-2
TROUBLESHOOTING
N N