U20-3, U25-3 WSM Machine body (Service section)
II-S-46
c Track tension device
1) Assembling procedure
1. Make sure the unit slides smoothly in the
track frame.
2. Tightening torque of idler assembly and
tension spring plate:
77.5~90.2N·m(7.9~9.2kgf·m)
Apply screw LOCTITE. (Loctite 547)
3. Idler lubricant amount Engine Oil Release
controller SAE#30CD U-20-3:35cc·U-25-
3:75cc
4. Engine Oil Make the setting at split pin
position nearest to 174.3
±0.5 mm.
5. Parts list
2) Tension cylinder
1. Tightening torque of nipple:
98~107.8N·m(10~11kgf·m)
2. If the cylinder has been detached, check
the rod (rod seal, O-ring side) for grease
leak.
3. If the nipple has been detached, check the
tube and nipple seat for scratches and dust
deposits.
4. In detaching the nipple, keep in mind that
the nipple may pop out because of the
inner pressure of the cylinder
.
No. Part No. Part name Q’ty Remarks
1 RB411-2130Δ Idler, assembly 2 U-20-3
RB511-2130Δ Idler, assembly 2 U-25
2 RB411-2140Δ Spring, assembly 2 U-20-3
RB511-2140Δ Spring, assembly 2 U-25
3 01133-61230 Bolt 8 M12×1.25
4 RB411-2150Δ Cylinder, assembly 2
No. Part No. Part name Q’ty
1 RB411-2151Δ Cylinder tube 1
2 RC101-21571 Rod 1
3 RC101-21553 Nipple, assembly 1
4 68241-21551 Rod seal 1
5 04810-00400 O-ring 1
6 68051-62371 Backup ring 1
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