Lit. No. 40694, Rev. 04
35
May 1, 2021
MAINTENANCE
Hose or Fitting Replacement
DO NOT
use thread sealant/tape on hoses or
fi
ttings.
This could damage product. Follow recommended
replacement procedures for
fi
ttings and hoses.
1. Lower snowplow completely, and turn control OFF.
NOTE: Loosen breather slowly to relieve any
pressure in the reservoir.
2. Carefully note hose routing for proper reassembly.
3. Loosen hoses or
fi
ttings slowly to relieve any
residual pressure.
4. To remove a hose, loosen and unscrew the hose
fl
are nut from the
fi
tting.
5. To remove a
fi
tting, loosen the jam nut and
unscrew the
fi
tting from the port.
WARNING
Lower blade when 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
could result in serious personal injury.
Procedure for Installing Hydraulic Fittings
and Hoses
NOTE: Overtightening JIC hose
fi
tting ends will
result in a fractured
fi
tting.
DO NOT
use any type of sealant or tape on the
fi
ttings
or hoses. This could damage product. Always use two
wrenches to ensure proper tightening of
fi
ttings and
hoses.
Use the following procedure to install SAE O-ring
fi
ttings in valve block and rams:
1. Turn jam nut on
fi
tting as far back as possible.
2. Lubricate O-ring with clean hydraulic
fl
uid.
3. Screw
fi
tting into port by hand until the washer
contacts the port face and shoulder of the jam nut
threads.
4. Unscrew
fi
tting to proper position, no more than
one full turn.
5. Using two wrenches, hold
fi
tting body in position
and tighten jam nut until the washer again
contacts port face, then tighten an additional
1/8 to 1/4 turn to lock
fi
tting in place. Final torque
on the jam nut should be approximately 20 ft-lb.
Use the following procedure to install hydraulic
hoses:
1. Screw
fl
are nut onto
fi
tting
fl
are and hand tighten.
2. Align hose so there are no twists or sharp bends
and so it will not be pinched or pulled by moving
parts.
3. Using two wrenches, hold the hose in position
and tighten
fl
are nut 1/8 to 1/4 turn beyond hand
tight. Final torque on the
fl
are nut should be
approximately 20 ft-lb.
