Service Repair Manual
D6H TRACK-TYPE TRACTOR
Product: TRACK-TYPE TRACTOR
Model: D6H TRACK-TYPE TRACTOR 4YF
Configuration: D6H TRACK-TYPE TRACTOR / POWERSHIFT / 4YF04000-UP (MACHINE) POWERED BY 3306 ENGINE
Disassembly and Assembly
D6H TRACTOR POWER TRAIN
Media Number -SENR3242-03
Publication Date -01/11/2004
Date Updated -10/01/2017
SMCS - 4170-015; 4170-016; 4170-076; 4170-077
The machine must be on a level hard surface before a separation of the
track is made. Any time a separation of both tracks is made the
machine must have blocks correctly in position so the machine will not
1. Remove track adjuster cover (1) and the O-ring seal from the roller frame.
The adjuster cylinder for the track is under high hydraulic pressure. Do
not visually inspect the relief valve to see if grease is released when it is
open. Look to see that the track has loosened. Use this warning any time
the tracks are loosened or tightened.
D6H TRACK-TYPE TRACTOR / POWERSHIFT / 4YF04000-UP (MACHINE) PO...
2. Loosen the track as follows:
a. Turn the relief valve (2) one turn counterclockwise to permit grease to be released from the
track adjuster. If the track does not loosen go to Step b.
b. Turn fill valve (3) one turn counterclockwise to permit grease to be released from the track
adjuster. If the track still does not loosen, start the machine and move it forward and backward. If
grease is still not released go to Step c.
c. Install a piece of round bar stock between the bushing and sprocket inside the links. Move the
machine to the rear so the track will be pushed up by the round bar stock. This will put tension on
the track and move the track adjuster in.
3. Move the track until the master link is just above the centerline of rear idler (4). Put wood
blocks under the grouser bar, just below the master link. Move the track to the rear until it has