Hydraulic System. - TM-55-4920-405-13-P0088

TM 55-4920-405-13&P

Cut back the insulation on the

(a) Check the tags you attached when you

removed these items.

wire that is to be replaced and on

the replacement wire about 1/2

(b) Install each of these items in the re-

inch.

verse order of removal.

Tin each end of the exposed wire,

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and cut one half the diameter of

CAUTION-

---.

each soldered end.

Place the cut halves on one end of

Use care to avoid bending or denting

the new and old wires end to end

hydraulic tubing.

on top of each other, and solder

(2) Hydraulic Pump. To install hydraulic

the two wires together.

Cut away stray ends to make a

pump (5, figure 4-5), proceed as follows:

smooth surface.

Disconnect the opposite end of

NOTE

the leadwire that is to be re-

moved, and gently pull that end.

The hydraulic pump must be installed be-

fore the fluid reservoir is installed.

This will cause the new wire to

follow the wire being replaced

into the wiring harness. Continue

Position the hydraulic pump on the

(a)

test stand chassis so that the marks

pulling until the new wire extends

the required distance at each end

you made during hydraulic pump re-

moval line up.

of the wiring harness.

Secure the hydraulic pump to the

(b)

Cut the new leadwire to length,

chassis with four bolts.

and trim back the insulation far

Slide the coupling cover over the shaft

(c)

enough to attach lugs.

of the hydraulic pump so that the gears

Tin the exposed portion of the

mesh. Install the snap ring on the

wire, and attach lugs at the ends

engine side of the coupling.

of the leadwire.

(d)

Connect FLOW INDICATOR GPM (11,

Connect the lugs to the proper

figure 2-1) to the hydraulic pump.

connection points.

(e)

Connect all hydraulic tubing and fit-

tings removed during disassembly of

(8) Starter and Ignition Switches. To install

the hydraulic pump.

STARTER switch (5, figure 2-2) or IGNI-

TION SWITCH (2), proceed as follows:

(3)

Volume Control. To install VOLUME con-

trol (14, figure 2-1), proceed as follows:

(a)

Make sure that a hex nut and external

tooth lockwasher are on the switch

NOTE

shaft. Push the switch shaft through

the hole in the control panel from the

The hydraulic pump must be installed be-

back side.

fore you install the VOLUME control.

(b)

Install the round knurled nut on the

switch shaft, and tighten this nut only

Install the extension shaft in the hy-

(a)

until the nut is flush with the end of

draulic pump volume adjusting screw,

the switch shaft.

and tighten the setscrews. (See fig-

(c)

Hold the switch in its proper position.

ure 4-7.)

Tighten the hex nut against the rear of

Slide the sleeve over the extension

(b)

the control panel.

shaft, and screw the sleeve onto the

(d)

Check the tags on the leadwires you

hydraulic pump. Tighten the set-

disconnected when removing the

screws in the sleeve.

switch. Connect the leadwires to the

Working from the front end of the con-

(c)

correct switch terminals.

trol panel, screw the locking lever on-

to the sleeve.

(9) Starter Solenoid. To install the starter

Install the washer. Install the key in

(d)

solenoid, proceed as follows:

the keyway in the extension shaft. and

install the VOLUME control handwheel

(a) Attach the starter solenoid to the back

over the key onto the extension shaft.

side of the start-up control panel with

Install and tighten the nut that secures

(e)

screws and lock washers.

the VOLUME control handwheel.

(b) Attach the electrical cables to the

starter solenoid terminals with nuts.

(4) Compensator Control. To install PRES-

SURE COMPENSATOR (16, figure 2-1),

proceed as follows:

b . Hydraulic System.

NOTE

The hydraulic pump must be installed be-

(1) Tubing, Hoses, and Fittings. To install

fore you install the PRESSURE

hydraulic lines, tubing, and fittings, pro-

COMPENSATOR.

ceed as follows:

4-40