Bush Hog BH750 - Manual (Page 19)

STABILIZER PADS
The backhoe is supplied with flip-over stabilizer feet
as standard equipment. They are suitable for most
backhoe work and generally are all that is ever
required. However, foot pad kits are available as
options. These kits bolt to the standard feet and
increase the versatility of the backhoe. See Figure
10.
Hydraulic Trouble Shooting
The trouble shooting material presented in this sec-
tion is offered as a guide to diagnosing probable
causes and remedies for general operational prob-
lems. Match your problem with the typical problem
examples given, and note the possible cause and the
proper corrective action.
NOTE: When using the following chart, if it is decided
that an overhaul of components or pressure adjust-
ments are necessary to correct malfunctioning, it is
recommended that your dealer make these repairs.
He is equipped to do this work.
17
Figure 10
WARNING
Escaping hydraulic / diesel fluid under pressure
can penetrate the skin causing serious injury.
Do not use your hand to check for leaks. Use a
piece of cardboard or wood to check for leaks.
Stop engine and relieve pressure before connect-
ing or disconnecting lines.
If any liquid is injected into the skin, obtain med-
ical attention immediately or gangrene may
result.
TROUBLESHOOTING PROCEDURES
Problem Cause Correction
Machine fails to operate
when started initially
Low oil supply in reservoir Fill to proper level.
No oil supply to machine Oil is not being diverted from the
prime mover hydraulic system.
Be sure that the proper controls are
actuated on the prime mover.
Pump not running Check pump drive to be sure it is
engaged.
Improper hose connection IMPORTANT: Be sure inlet and return
hoses are hooked up correctly.
Improper hook-up will result in
damage to the backhoe valve.
Excessive back pressure Relieve condition. Restriction may be
from outlet to reservoir.
Relief valve setting in backhoe Relief pressure will have to be checked
control valve too low or and corrections made. Backhoe
defective system pressure is 2400 PSI. Relief valve
may need cleaning and or overhauling or
entire cartridge must be replaced.
Machine loses power after Low oil supply in Fill to proper level.
operating satisfactorily reservoir
initially
Loose oil line connections, Tighten all hose connections and
leaks in line or broken lines replace any damaged O-rings at
leaking O-ring fittings. Check and
replace any damaged hoses and lines.
Oil is bypassing cylinder piston, Replace or rebuild the cylinder; replace
scored piston, worn piston damaged parts.
packing, or defective piston
assembly