DESCRIPTION - TM-5-3820-256-24-4

STAMPED ANGLE SPRING CLUTCH - TM-5-3820-256-24-4_497

Fig. 4 Checking Release Bearing Adjustment

TM-5-3820-256-24-4 Drilling System Well Rotary Truck Mounted Air Transportable 600 Feet Capacity Model LP-12 NSN 3820-01-246-4276 Manual
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SERVICE MANUAL DESCRIPTION The clutch control linkage (Figure 1) consists of a suspended clutch pedal connected by a rod to a relay (bellcrank) which is, in turn, connected by another rod to the clutch release shaft lever. The clutch pedal and relay shaft pivot on low friction bushings of non-metallic (Acetal) material. Adjustments are provided to establish correct initial settings and to compensate for wear of clutch disc facings. Fig. 1 Clutch Control Linkage (Typical) 1 Relay Assembly (Bellcrank) 2 Upper Control Rod 3 Pedal Stop 4 Return Spring 5 Pedal 6 Release Shaft Lever 7 Lower Control Rod MAINTENANCE LUBRICATION Clutch control components (release bearing, release shaft, relay shaft and linkage yoke pins) should be lubricated at the intervals specified in the vehicle Operator’s Manual and at the time of clutch or clutch control linkage service. For lubricant types, refer to LUBRICATION section of the Service Manual. Some clutches are equipped with prelubricated, sealed release bearings which do not require periodic lubrication. INSPECTION At the time of vehicle chassis lubrication, check clutch pedal free travel. If free travel is less than the specified dimension, make necessary adjustments (see ADJUSTMENT). At least once each year and in the event of clutch service, inspect clutch control linkage for worn or damaged parts. Worn yoke pins and yoke pin holes in control rods and levers could affect linkage adjustment and clutch operation. Replace any. worn or damaged parts. When installing new parts, clutch linkage should be lubricated and readjusted. ADJUSTMENT To assure correct clutch operation and long service life of clutch components, the clutch and linkage must be kept in proper adjustment. Adjustment factors are clutch release bearing clearance and clutch pedal free travel. Pedal free travel is determined by release bearing clearance. Adjustment must be made periodically to compensate for wear of clutch disc facings (as indicated by reduction of pedal free travel) and at the time of clutch or clutch control linkage service. Adjustment procedures, which vary between clutch types, are outlined on the following pages. CTS-4050 - Page 3

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