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®
SD-11-1357
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Bendix® AH-4™ Air Hydraulic Intensifier
DESCRIPTION
The
The type 30 unit is designed for dusty operation, as in off- highway, with the
The master cylinder may have a remote or direct mounted reservoir. Fig. 1 shows a 23.5 to 1 unit with integral reservoir.
OPERATION
The
PREVENTIVE MAINTENANCE
Important: Review the warranty policy before performing any intrusive maintenance procedures. An extended warranty may be voided if intrusive maintenance is performed during this period.
Because no two vehicles operate under identical conditions, maintenance intervals will vary. Experience is a valuable guide in determining the best maintenance interval for a vehicle.
Every Month, After 8,000 Miles, or 300 Operating Hours
1.Remove the cover and gasket from the brake fluid reservoir, taking extreme care to first remove all dirt and foreign material so that no foreign material is permitted to get into the hydraulic fluid. If the fluid lever is low, proper fluid should be added. CAUTION - The cover and gasket will each indicate whether hydraulic brake fluid or mineral oil should be added. The gasket for brake fluid is black and the gasket for mineral oil is green.
2.Check the stroke warning switch by grasping the switch extension rod underneath the rubber boot and pulling firmly. With the ignition turned on, the warning light in the cab should light. NOTE: If the warning light comes on during a service application, the vehicle should be brought in for service immediately.
3.Check tightness of mounting nuts, air and hydraulic fittings.
Every 12 Months, 100,000 Miles, or 3,600 Operating Hours
1.Disassemble and clean all parts.
2.Install new rotochamber diaphragm, reservoir gasket, seals or any parts worn or damaged.
OPERATING AND LEAKAGE TESTS
Operating Test
1.With the air system built up to governor
2.While still holding the brake application, check for hydraulic fluid leaks at all fitting connections and at the disc brake calipers.
1