Hydraulic adjustment

ME 3930-624-34/4-21

Figure 4-21. Inching pedal mechanical adjustment.

(b) Install the return spring (normal length

(a) Install a 160 or 300 psi pressure gage at

10 in.). Tighten the spring until it is 11-11 in.

the pressure port of the powershift control cover.

(b) Depress the brake pedal until the brake

long.

(c) Position the inching spring against the

shoes engage the drum. A slight resistance will be

plunger so that the deflection is 3/32-1/8 in.

felt in pedal movement.

(d) Raise the drive wheels off the floor, start

(c) Place a wedge between the brake return

the engine and operate at high idle, and shift the

stop and the pedal lug to fix the position of

transmission into forward or reverse gear. The

engagement.

(d) Engage the parking brake.

inching valve plunger must not move forward.

(e) Lower the wheels to the ground. engage

(e) Start the engine and operate at low idle

the brakes, and place the transmission in gear. The

(500 to 600 rpm). Place the transmission in neutral

engine should approach a stall. Shut down the

and keep the seat deck down. Depress the inching

engine.

pedal until the pressure gage reads 6 to 10 psi.

(2) Hydraulic adjustment. (fig. 4-22.)

Note. Do not perform hydraulic adjustments until the

mechanical adjustments are correct.

4-24