Every 400 Hours (Interim Tier 4/Stage III B) (S660 and S670)

1. 
   H100280-UN-17FEB11

   
   H100290-UN-17FEB11

   
   H100281-UN-17FEB11

   A - Shield

   B - Bleed Screw

   C - Driver Sheave

   D - Driven Sheave

   Engine Shielding - Remove and retain shield (A).

---




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

3. IMPORTANT: Inner driver sheave must be fully retracted to obtain proper amount of lubrication.

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

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

4. IMPORTANT: 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 (D). Push driven sheaves together until they are completely closed. Grease fitting 10—12 pumps. Excess grease will purge from front side of driven sheave.

   Tighten bleed screw and nut on valve to specification.

   Item	Measurement	Specification
   Bleed Screw and Nut	Torque	23 N·m (17 lb.-ft.)

   Instal previously removed shield.