DRESSTA TD-25M EXTRA, Service Manual

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SECTION 14
SUSPENSION
Page 24
TD-25M EXTRA DRESSTA
TRACK ROLLER
IMPORTANT: Do not at any time handle the oil seal with greasy, oily dirty hands. The track rollers
must not be filled with lubricant until the rollers and track frame are in position on the dozer.
2. Before installing seal kit assembly, be sure seal contacting surfaces of retainer and track roller
shaft bracket are clean. Also that rubber rings of seal assembly are correctly positioned on
metal rings. Refer to SEAL INSTALLATION under METAL TYPE FACE SEALS in this Section.
3. Install the washer (6) in the roller bore. Apply a small amount of grease to O-ring (5) and install
in groove in retainer (4). Apply LOCTITE #262 to threads and secure the retainer to the roller
housing. Torque the bolts to 135 [Nm]. To prevent roller assembly from moving as bolts are
torqued, a strap can be used to secure roller housing to bench as shown in Fig. 14.28.
Fig. 14.28. Torquing Bolts Fig. 14.29. Roller end Clearance
4. Insert the shaft (8) into the roller housing so the end of the shaft with drain plug (11) is on the
same side as the two drilled holes in the roller housing. Install the washer (6), O-ring (5) and
retainer (4) on the opposite side of the roller housing as was done previously.
5. Check that track roller end clearance is within tolerance given in Fig. 14.26. From side of roller
dial indicator is to be mounted to, push roller shaft into housing to be sure it is bottomed against
washer (6). Place dial indicator magnetic base on roller housing with indicator pointer resting
against end of shaft. Set indicator at zero (Fig. 14.29). Pull up on shaft until it bottoms and take
a reading. If reading obtained is below specification, check surfaces (A, B and C, Fig. 14.26) for
squareness. If above specifications, check parts for excessive wear.
6. Install the seal kit (3) as described in SEAL INSTALLATION under METAL TYPE FACE SEAL in
this Section.
7. Install the O-ring (2) into the groove on the inside of the roller bracket (1) and lubricate the
O-ring with chassis lubricant.
8. Install roller bracket (1) on shaft (8). Apply hand pressure to roller bracket (1) as shown in
Fig. 14.30 until spring pin holes are aligned. Install spring pin (12) until it is slightly below
bracket surface and peen over bracket casting to maintain its position. Repeat on opposite side
of roller.
9. Fill track roller with recommended lubricant. Refer to OPERATOR'S MANUAL for recommended
lubricant. Clean threads of plug (11) and apply LOCTITE Pipe Sealant with Teflon #592. Install
plug in track roller shaft (8) and torque to 20 - 50 [Nm].