Lit. No. 72451, Rev. 03
30
October 15, 2019
MAINTENANCE
Hose or Fitting Replacement
DO NOT
use thread sealant/tape on hydraulic hoses
or fittings. These materials could damage the product.
Follow recommended replacement procedures for
fittings and hoses.
1. Lower the blade completely. Turn the control OFF.
2.
Remove the fill plug.
NOTE: Remove fill plug slowly to relieve any
pressure in reservoir.
3.
Loosen the hoses or fittings slowly to bleed off any
residual pressure.
4. Carefully note hose routings and the location of
any protective hose wraps, for proper reassembly.
5. To remove a hose, loosen and unscrew the hose
flare nut from the fitting.
6.
To remove a fitting, loosen the jam nut and
unscrew the fitting from the port.
WARNING
Lower the blade when the vehicle is parked.
Keep 8' clear of the blade. Temperature
changes could change hydraulic pressure,
causing the blade to drop unexpectedly or
damaging hydraulic components. Failure to
do this can result in serious personal injury.
Procedure for Installing Fittings
and Hoses
NOTE: Overtightening the JIC hose fitting ends
will result in a fractured fitting.
DO NOT
use thread sealant/tape on hydraulic hoses
or fittings. These materials could damage the product.
Always use two wrenches to ensure proper tightening
of fittings and hoses.
Use the following procedure to install SAE O‑ring
fittings in the valve block and rams:
1.
Turn the jam nut on the fitting as far back as
possible.
2.
Lubricate the O-ring with clean hydraulic fluid.
3.
Screw the fitting into the port by hand until the
washer contacts the port face and the shoulder of
the jam nut threads.
4.
Unscrew the fitting to its proper position; no more
than one full turn.
5.
Using two wrenches, hold the fitting body in
position and tighten the jam nut until the washer
again contacts port face, then tighten an additional
1/8 to 1/4 turn to lock the fitting in place. Final
torque on the jam nut should be approximately
20 ft-lb.
Use the following procedure to install hydraulic
hoses:
1.
Screw the flare nut onto the fitting flare and hand
tighten it.
2. Align the hose so that there are no twists or sharp
bends and so that it will not be pinched or pulled
by moving parts.
3. Using a pair of adjustable pliers, hold the hose in
position, and use a wrench to tighten the flare nut
1/8 to 1/4 turn beyond hand tight. Final torque on
the flare nut should be approximately 20 ft-lb.
4. Reinstall any protective hose wraps in their
original positions.
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