MAINTENANCE For information on the alternator assembly, contact an authorized Delco Remy® or Bosch® distributor, depending on manufacturer. Item 21 Engine and Transmission Mounts The engine and transmission mounting bolts and the condition of the mounting pads should be checked every 60,000 miles (96,000 km) or 600 hours. Tighten and/or repair as necessary. Bosch® T1 Alternator Service Requirements The transistor regulator must be replaced every 100,000 miles (160,000 km) using kit part number 23524613 (includes regulator assembly and brushes). Front and rear bearings must be replaced every 200,000 miles (320,000 km) using kit 23524614 (includes bearings, seals and spacer ring).
Authorized Bosch distributors have the parts, tools and trained personnel to perform these services. Item 22 – Crankcase Pressure The crankcase pressure should be checked and recorded every 60,000 miles (96,000 km) or 600 hours. Item 23 Fan Hub If the fan bearing hub assembly has a grease fitting, use a hand grease gun to lubricate the bearings with one shot of quality lithium-base, multi-purpose grease every 100,000 miles (160,000 km) for vehicle engines. General Service Requirements Bosch® and Delco Remy® Alternators Terminals should be checked for corrosion and loose connections and wiring inspected for damage and frayed insulation. Have wiring repaired or replaced, as required.
Care should be taken not to overfill the bearing housing. Item 24 – Thermostats and Seals Check torque on alternator mounting bolts and bracketing every 15,000 miles (24,000 km) on truck and coach engines or every 300 hours on all other engines. Retighten, if necessary. Replace the thermostats and seals every 240,000 miles (384,000 km) on vehicle engines. 72 All information subject to change without notice. DDC-SVC-MAN-0039 Copyright © 2009 DETROIT DIESEL CORPORATION