Owner Service 21; Hydraulic Hoses And Fittings; Relief Valve; Lubrication - Woods BH85 Operator's Manual

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.
 Before working on backhoe, extend boom and
dipperstick and place bucket on ground. Shut off
tractor engine. Make sure that all system pressure
has been relieved by operating controls before
maintenance, service, or disconnecting any
hydraulic lines.
CAUTION
 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.
HYDRAULICS
 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.
CONTACT A PHYSICIAN IMMEDIATELY IF FLUID
ENTERS SKIN OR EYES. DO NOT DELAY.
 Hydraulic oil and components get hot during
operation. Let cool before performing any mainte-
nance.

Hydraulic Hoses and Fittings

Hydraulic hoses are severely worked on a backhoe.
Examine them daily and replace if necessary. Hose
routing is very important. Make certain hoses can move
freely, without kinking, and cannot be damaged or cut
by backhoe action.
When tightening hoses and fittings, always use two
wrenches: one to hold hose and one to tighten fitting.
This will prevent hose from twisting and kinking.
MAN1272 (10/22/2019)
OWNER SERVICE
ARNING
ARNING
Always back lock nut off and screw fitting all the way in
for fittings that use O-rings for sealing. Then hold in
position and tighten lock nut.
IMPORTANT: Fittings with O-rings and flange do not
require additional sealant; replace damaged O-rings.
Relief Valve (Figure 18)
This valve is pre-set at the factory to prevent system
pressure from exceeding 2465 psi.
WARNING! 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 18. Relief Valve, BH85 & BH100

LUBRICATION

 Keep all persons away from operator control
area while performing adjustments, service, or
maintenance.
It is recommended that all fittings be lubricated daily or
every eight hours of operation. In very wet or dry condi-
tions, lubricate every four hours of operation. See Fig-
ure 19 and Lubrication and Maintenance Schedule
on Pg. 22
Use an SAE multi-purpose type grease for all locations
shown unless otherwise specified. Be sure to clean fit-
ting thoroughly before using grease gun. One good
pump of most guns is enough.
IMPORTANT: Do not let excess grease collect on or
around parts, particularly when operating in sandy
areas.

Owner Service 21

ARNING