REMOVAL (PNEUMATIC TIRE)

TM 10-3930-644-14&P

1. Completely deflate the tube assembly. Remove

in the wheel, and press or drive the cups into

valve core from tube.

their bores. Cups must be square with the

bores, and fully seated at installation.

2. To remove the steer wheel tire, tube and flap,

remove the (6) six bolts, nuts and lockwashers

2. Lubricate the inner wheel bearing cone with

(inside the inner rim) and separate the inner and

specified grease. Use an applicator designed to

outer rims. (See Figure 37.)

force lubricant into the bearing rollers.

CAUTION

3. Position inner beari ng cone on the spindle.

A safety tire rack, cage, or equivalent

Lubricate the bearing cups in the wheel and

protection should be provided and

carefully install the wheel on the spindle.

used when inflating, mounting, or

dismounting tires installed on split

4. Lubricate the outer bearing cone with the

rims, or rims equipped with locking

specified lubricant, using an applicator. Install

rings or similar devices.

the bearing cone on the spindle.

3. Replace or repair the defective tire, tube or flap

5. install washer and retaining nut on spindle.

and reassemble in reverse order of removal by

While rotating steer wheel, tighten retaining nut

placing tube in tire, then inserting flap; place

to a torque of 50 lb-ft; then back off nut until

inner and outer rims in tire and secure nuts,

loose (0 Ib-ft). Rotate wheel alternately in each

bolts and lockwashers.

direction while tightening retaining nut until a

4. Insert valve core a d inflate tube to specified

torque of 25 lb-ft is obtained. Then back off nut

pressure.

300 min to 60 max and install cotter pin.

For good performance and long life, the correct tire

6. Install hub cap and secure with capscrews and

pressure must always be maintained in pneumatic tires.

lockwashers, tightening capscrews securely.

Under-inflation will cause damage to tire cords and may

allow the tires to slip on the rims, tearing out the inner

7. Raise vehicle slightly with the hoist and remove

tube valve stem. Over-inflation will result in excessive

the wooden blocks from under the frame. Then

slippage, causing rapid tread wear. (See Figure 38.)

lower vehicle so steer wheels rest on the floor.

Remove hoist from rear of vehicle.

Air pressure should be checked ever day with an

accurate tire gauge having one pound graduations. Do

E. REMOVAL (PNEUMATIC TIRE)

not allow tire pressures to drop below the recommended

rating. Always be sure that the valve stem caps are in

1. Ensure drive wheels are securely blocked and

place and turned tight by hand.

set parking brake to prevent truck from rolling.

Never use pliers to tighten valve stem caps. The caps

2. Remove the nuts and loc kwashers attaching the

prevent loss of air by keeping out any water or dirt which

rims to the bolts in the wheel hub. (See Figure

could otherwise enter the valve core and cause damage.

37.)

G. TIRE PRESSURE

3. Pull the tire and rim assembly from the hub.

Maximum recommended pressures for pneumatic tires

are as follows:

F. SERVICE - TIRE AND TUBE REPAIR

5.00 x 8" x 6 ply ................................................ 80 p.s.i.

If a tire is excessively worn or badly damaged replace it

6.00 x 9" x 10 ply ............................................ 100 p.s.i.

as follows:

6.50 x 10" x 10 ply........................................... 100 p.s.i.

7.00 x 10" x 10 ply ............................................ 85 p.s.i.

CAUTION

7.50 x 10" x 12 ply .......................................... 100 p.s.i.

Ensure tube has been completely

7.00 x 12" x 6 ply .............................................. 95 p.s.i.

deflated prior to separating rims.

7.00 x 12" x 12 ply .......................................... 100 p.s.i.

7.00 x 15" x 6 ply .............................................. 70 p.s.i.

7.00 x 15" x 12 ply .......................................... 100 p.s.i.

7.50 x 15" x 10 ply ........................................... 95 p.s.i.

8.25 x 15" x 12 ply ......................................... 100 p.s.i.

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