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18 Owner Service
51861 (Rev. 6/16/2006)
OWNER SERVICE
The information in this section is written for operators
who possess basic mechanical skills. If you need help,
your dealer has trained service technicians available.
For your protection, read and follow the safety informa-
tion in this manual.
Keep hands and body away from pressurized
lines. Use paper or cardboard, not hands or other
body parts to check for leaks. Wear safety goggles.
Hydraulic fluid under pressure can easily penetrate
skin and will cause serious injury or death.
Make sure that all operating and service person-
nel know that if hydraulic fluid penetrates skin, it
must be surgically removed as soon as possible by
a doctor familiar with this form of injury or gan-
grene, serious injury, or death will result. CON-
TACT A PHYSICIAN IMMEDIATELY IF FLUID
ENTERS SKIN OR EYES. DO NOT DELAY.
Before working on backhoe, extend boom and
dipperstick and place bucket on ground. Make sure
that all system pressure has been relieved by oper-
ating controls before maintenance, service, or dis-
connecting any hydraulic lines.
Always wear relatively tight and belted clothing
to avoid getting caught in moving parts. Wear
sturdy, rough-soled work shoes and protective
equipment for eyes, hair, hands, hearing, and head;
and respirator or filter mask where appropriate.
OPTIONAL AUXILIARY PUMP AND
HYDRAULIC SYSTEM
IMPORTANT
■ Fill with clean oil. Do not mix oil types or
grades.
Daily, check the fluid level in reservoir with filler cap
dipstick. Contamination will shorten the life of hydraulic
system components. Change oil and filter after first 20
hours of operation and then every 200 hours of opera-
tion or annually, whichever occurs first. In extremely
dusty or dry conditions, more frequent changes may be
necessary. System capacity is approximately 5 to 5-1/2
US gallons.
Engage PTO and run at idle for 5 minutes, then check
oil level. Add fluid as necessary.
RELIEF VALVE
This valve is pre-set at the factory to prevent system
pressure from exceeding 2100 psi. Do not attempt to
reset the valve for open-center hydraulic systems. If
valve is malfunctioning, replace it with an authorized
factory replacement part or have service done by a
qualified dealer.
Figure 11. Relief Valve
BUCKET TOOTH REPLACEMENT
Remove worn tooth by driving a chisel between shank
and tooth.
Install replacement tooth and use a punch to peen
tooth to shank on both sides.
CAUTION
Recommended Oils and Temperature Ranges
Do not mix oil grades or types
SAE Hydraulic
Transmission Fluid. . . . . . . . .All Temperatures
Type “A” or “F” ATF . . . . . . . .All Temperatures
SAE 30-30W . . . . . . . . . . . . . 90° F and above
SAE 20-20W . . . . . . . . . . . . . . . . . 35° - 90° F
ASAE 10-10W . . . . . . . . . . . . 35° F and below
DO NOT ADJUST
RELIEF VALVE
CD4677