2 1 Remove the seat and hydrostatic shield. 2 Loosen the high pressure relief valve caps 4 complete turns. There are 4 high pressure relief valves, 2 on the top side, and 2 on the bottom side of the tandem pump. Be sure to loosen all 4. ( fig. C3665 ) Torque caps 30 to 50 ft / lbs (41 to 68 N.m.) upon reassembly. 3 The loader parking brake system is released by hydrostatic pressure. To release the parking brake when the unit has failed you must pressurize the brake system manually. A service override for the brake valve has been incorporated for use by Thomas Dealers. The normal position of the plunger is down and turned into the locked position.
To release the brake, turn the release plunger counter clockwise. (fig. C3666) Access of the small quick connector for the 175 in the engine compartment. (fiq.C3870) Access the small quick connector for the 1700 in the tandem compartment (fiq. C3871) Use a port -a - power to pressurize this line to 200 psi (13.8 bar). The brakes are now released. WARNING Be sure to return the brake valve plunger to the normal position after servicing the loader. CAUTION To prevent damage to the drive motors, do not exceed speed of 1 MPH. 4 Use the front frame mounted tie downs to attach pulling devise. ( fig. C3447 ) Use the rear tie downs to pull the loader backwards. ( fig.
C3446 ) WARNING Use chains or cables rated a minimum of 1 and 1/2 times the gross vehicle weight. 2-10 TOWING 2.5 Towing Procedure In the event the loader has malfunctioned or failed, the loader may be moved a short distance by following the procedure below. WARNING Failure to follow the proper towing procedure may cause damage to the hydrostatic drive system. Relief valve location C3665 C3665 Brake release plunger Brake valve C3666 C3666 Brake release coupler C3870 Brake release coupler C3871 C3871 Front tie down C3447 Rear tie down C3446 C3447 C3446