DRESSTA TD-25M EXTRA, Service Manual

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SUSPENSION
SECTION 14
Page 9
DRESSTA TD-25M EXTRA
GENERAL
Fig. 14.8. Measuring Track Roller Rolling
Diameter
Fig. 14.9. Measuring Top Idler Rolling
Diameter
1. Caliper 2. Scale 1. Caliper
FRONT IDLER
6. DESCRIPTION
The front idler provides a freely rotating, guiding support of the track chain. The idler is supported
on replaceable wear bars which slide on the track frame channels. This sliding feature helps
protect the track frame components by allowing the track springs to absorb shock loads. The idlers
are heat-treated steel castings and rotate around bushing. The idlers are equipped with metal face-
type seals which maintain a leak and dirt-proof seal.
7. REMOVAL
WARNING! Before working at the machine, be sure that the blade and ripper have
been lowered to the ground, engine is OFF, the drive train control lock lever is in
locked (ON) position and parking brake is set. The starting switch and the electrical
system master switch are turned OFF, keys are removed and the controls are
tagged to prevent inadvertent engine starting.
CAUTION! Lift and handle all heavy parts with a lifting of proper capacity.
Be sure parts are secured by proper slings and hook. Use lifting eyes if provided.
Warn people in the area to stand clear.
1. Remove the track chain (3, Fig. 14.10) as described in SECTION 15. It is only necessary to lift
chain free from front idler. Remove front idler covers (1) from the track frame (2).
2. Be sure the relief valve (1, Fig. 14.11) is unscrewed one full turn to avoid entering a vacuum in
the cylinder.
3. Move the front idler and attach a hoist to front idler (4, Fig. 14.10) and fork. Remove front idler
with fork from track frame.