Western MIDWEIGHT, Installation Instructions Manual

Lit. No. 64369, Rev. 04 

14 

June 15, 2010

INSTALLATION INSTRUCTIONS

Procedure for Installing Hydraulic Fittings 
and Hoses

Do not use any type of sealant or tape on the 

fi

 ttings 

or hoses. These materials could damage the product.

Always use two wrenches to ensure proper tightening 
of 

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 ttings and hoses.

Use the following procedure to install SAE O-ring 

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 ttings in valve block and rams.

1.  Turn jam nut on 

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 tting as far back as possible.

2.  Lubricate O-ring with clean hydraulic 

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 uid.

3. Screw 

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 tting into port by hand until the washer 

contacts port face and shoulder of the jam nut 
threads.

4. Unscrew 

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 tting to proper position no more than 

one full turn.

5.  Using two wrenches, hold 

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 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 

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 tting in place. Final torque 

on the jam nut should be approximately 20 ft-lb.

Use the following procedure to install hydraulic 
hoses.

NOTE: Overtightening JIC hose 

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 ttings will result 

in a fractured 

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 tting.

1. Screw 

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 are nut onto 

fi

 tting 

fl

 are and hand tighten.

2.  Align hose so there are no twists or sharp bends.

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 

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 are nut should be 

approximately 20 ft-lb.

Lift Ram

The 8" lift ram is found in the hydraulics box. The 
mounting hardware is found in A,Q&L box #2.

1.  Position base end of lift ram between lugs on 

lower lift frame with port toward the rear. Install 
a 3/4" x 3-1/4" clevis pin. Secure with a 3/4" 

fl

 at 

washer and cotter pin.

2.  Align hole in the lift ram rod between holes in end 

of lift arm. Install a 3/4" x 3" heat treated (head 
marked "HT") clevis pin. Secure with a 3/4" 

fl

 at 

washer and cotter pin.

3.  With lift ram fully collapsed, rotate light bar until 

lower lift frame horns are horizontal, pull chains 
tight and insert into lift arm hooks. Final lift 
chain adjustment will be made after snowplow is 
mounted to vehicle.