Hy-tec Hydraulics 3
Remove LH side circlip of rockshaft
ADJUSTMENTS
4
Remove locking bolt of cam rocker arm. (13mm)
a. Adjusting the Position Control
Cam Mounitng Bolt
Rocker arm mouting bolt
5
Remove LH lift arm.
6
Remove both side oil seal.
7
Remove the both side washer oil seal.
8
Loosen & Remove the Cam and rocker arm mounting bolt.
9
Remove rockshaft from LH side only.
10 Remove two bushes (Only if Worn out ) from LH & RH. 11 Remove rocker arm with connecting rod. a) Remove spring (rollpin) of connecting rod. b) Remove connecting rod. c) Remove rocker arm.
Connect the lower links to a dead weight of 450kg. Open the isolating valve and set the draft lever to the deepest position. Lift the weight by operating position control lever slowly until the distance from the center line of the top hitch pin to the center line of the lift arm pin is 620mm lock the position control lever stop firmly behind the lever in touching position. NOTE : Check that this is correctly set by lowering and lifting to the top again with the position control lever. It should now be possible to lift the links a further 12.5mm approximately by moving the draft control lever to the top most position. b. Checking the relief valve pressure. Fit pressure gauge (0-214 kg/cm 2 ) in the external jack tapping. Close isolating valve. Put engine to full throttle and lift the draft control lever in the top most position the pressure reading should be as per specification (123-157 kg/cm2)
! W A R N I N G To avoid overheating the : system the pressure test should not be maintained for more than 30 seconds. After completion of the test the draft control lever must be returned to the deepest position otherwise serious damage to the hydraulic system may result. If the recorded pressure is not 154-168 kg/ cm2. It can be increased or decreased by adding or removing shims in the relief valve sping housing. Addition of one 0.076 mm will increase by 3.5 Kg/cm2 and removal of one shim will decrease the pressure by 3.5 Kg/cm2. SERVICE INSTRUCTIONS a. Adding Oil After every 250 hrs of operation, check the level of oil in the transmission reservoir. 71
