B--Cap Screw (4 used)
3. Replace parts as necessary.
CAUTION: Spring or rod may break if
dropped while handling, transporting or
4. Apply multi-purpose grease to dust seal (D), wear
disassembling. Nicks or weld craters in
ring (F), U-ring packing (G) and O-ring (J). Fill
spring and rod assembly can cause stress
grooves inside flange (C) with grease.
concentration resulting in a weak spot. Weak
spots may result in immediate or eventual
5. Install U-ring packing (G) with tip toward inside of
failure of spring or rod creating a risk of
personal injury. Put a heavy protective
covering around spring assembly when
6. Install parts (C--J).
handling, transporting, or disassembling.
7. Install cap screws (B) and tighten.
A compression tool must be used for
disassembly and assembly because of the
Flange Cap Screw--Specification
extreme preload on spring.
Torque....................................................................... 64 Nm (47 lb-ft)
NOTE: It is not necessary to remove the recoil spring
(Q) to replace wear ring (F) and U-ring (G). To
NOTE: The recoil spring is installed using ST4920
replace O-ring (J), remove recoil spring (Q)
Track Recoil Spring Disassembly and
and rod (I). The recoil spring is removed using
Assembly Tool. (See Disassemble and
the ST4920 Track Recoil Spring Disassembly
Assemble Track Adjuster Cylinder and Recoil
and Assembly Tool. (See procedure in this
Spring in this group.)
8. Install spacer (P) and spring (Q).
1. Remove spring (Q) and spacer (P).
2. Remove cap screws (B). Remove parts (C--J).