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Installation of the new torque arm requires the following:

2, grade5, ½”-13 UNC bolts, 2” long. (the 1-1/2” long bolts that come stock with the pump and speed

increaser are not long enough once the torque arm is installed.)

2, ½” flat washers

2, ½” lock washers

2 drops of Teflon based thread sealant (DO NOT USE THREAD TAPE!)

Start by turning off the oil supply from the

reservoir. Also, since there is no way to stop the

oil from coming out of the gearbox case drain line,

remove the case drain hose and position the end

of the hose so that it is at a higher elevation than

the fluid level in the tank.

Next, use a ¾” wrench to remove the two bolts

that hold the gear pump to the speed increaser,

But use care not to separate the pump from the

speed increaser as there is a large o-ring between

the two that could be damaged if not properly rein-

stalled.

With the pump and speed increaser still together,

hold the speed increaser and the plate between

the pump and speed increaser while rotating the

pump 180°. The holes should line back up and

the longer side of the pump should be aligned with

the case drain hole on the speed increaser.

Install the lock washer, then the flat

washer onto the bolt, and then place a small

amount of the Teflon based thread sealant on

the 2” long bolts as shown.

Align the torque arm so that the offset on

the torque arm and the big hose is on the

right hand side of the pump when looking at

the rear of the pump. Insert, hand start the

two, 2” bolts and tighten with a ¾” wrench.

Index the 90° hydraulic adapter so that

when the hose is installed, it will just pass

by the pump on the left hand side (This is

so the hose cannot become loose over

time.)

Re-install the case drain hose to the

speed increaser.

KMC Controls 42 Series User Manual

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