BRAKES - TM-5-2410-237-230762

TM 5-2410-237-23

STEERING AND BRAKE SYSTEM THEORY OF OPERATION - CONTINUED

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BRAKES - CONTINUED

When the brake pedal is released, spring (22) and

10 22 23

springs inside the hydraulic control mechanism move

the mechanical linkage and brake pedal. The struts

move away from each other. The brake band is not in

contact with the steering clutch drum. Now, the brakes

are in the "OFF" position.

Both brakes can be held in the "ON" position. Push

both brake pedals toward the front of the machine. At

the same time, push the parking brake lever forward

and down. The parking brake lever is at the right side

of the seat. The movement of the pawl (8) moves rod

(23) and engages the teeth of the pawl (8) with the

teeth of the ratchet. The brakes are held in the "ON"

position by the link. The links push against the

bellcrank (10). To release the brakes, push on the

brake pedals and pull the parking brake lever up and

backwards.

An oil line sends pressure oil to each brake band. This

oil is for lubrication and cooling of the brake bands.

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RELIEF VALVE FOR BRAKE COOLING AND LUBRICATION

The relief valve for brake cooling and lubrication is in the compartment for the left steering clutch. It lets oil at a specific

pressure go to the brake bands. Cool oil goes in the valve through opening (24) and fills chamber (25). The oil comes from the

oil cooler and goes through the lubrication manifold on the transmission case. Chamber (25) has two openings. A hose is con-

nected to each of the openings. One hose goes to the right brake band and the other hose goes to the left brake band. The oil

goes from chamber (25) through the two hoses to the brake bands. The oil pressure to the brake bands is controlled by spring

(26) and valve (27). When the pressure of the oil in chamber (25) goes above 50 psi +/- 5 psi (345 kPa +/- 34 kPa), valve (27)

moves and lets the extra oil go to the compartment for the left steering clutch.

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END OF WORK PACKAGE

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