DISASSEMBLE AND ASSEMBLE TRACK
ADJUSTER AND RECOIL SPRING
CAUTION: Spring or rod may break if dropped
while handling, transporting or disassembling.
Nicks or weld craters in spring and rod
assembly can cause stress concentration
resulting in a weak spot. Weak spots may result
in immediate or eventual failure creating a risk
of personal injury. Put a heavy protective
covering around spring assembly when
handling, transporting, or disassembling.
A compression tool must be used for
disassembly and assembly because of the
extreme preload on spring.
CAUTION: The approximate weight of track
recoil spring disassembly and assembly tool is
225 kg (496 lb).
1. Place an 18-t (20-ton) jack on bottom of ST4920 Track
Recoil Spring Disassembly and Assembly Tool (A).
Remove nuts (B) and top plate (C). (See Section 99 for
instruction to make tool.)
NOTE: It is not necessary to remove the recoil spring to
A--ST4920 Track Recoil Spring Disassembly and
replace wear ring and U-ring packing on piston.
B--Nut (12 used)
To replace O-ring in the cylinder, remove recoil
spring and rod.
2. Remove nuts (B). Remove top plate (C).
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