Variable Speed Driver/Driven Sheaves (Final Tier 4/Stage IV) (S760 and S770 Machines)

1. 
   H115710-UN-31AUG15

   
   H115711-UN-31AUG15

   A - Bleed Screw

   B - Driver Sheave

   C - Driven Sheave

   Variable speed drive bleed valve and sheaves are accessible by opening separator access cover.

   Variable Speed Drive Bleed Valve - Loosen bleed screw (A) to relieve pressure from sheaves.

---




2. Inner driver sheave must be fully retracted to obtain proper amount of lubrication.

   Sheave movement range can be impaired if sheaves are not fully separated.

   Variable Speed Driver Sheave - Locate grease fitting on the driver sheave (B). Pull driver sheave towards the engine until completely open. Grease fitting 10—12 pumps. Excess grease purges from the front side of the driver sheave.

3. Driven sheaves must be fully closed to obtain proper amount of lubrication.

   Sheave movement range can be impaired if sheaves are not fully closed.

   Variable Speed Driven Sheave - Locate grease fitting on driven sheave (C). Push driven sheaves together until they are completely closed. Grease fitting 10—12 pumps. Excess grease purges from the front side of the driven sheave.

   Tighten bleed screw and nut on the valve to specification.

   Bleed Screw and Nut	Torque	23 N·m (17 lb·ft)