Caterpillar — Alignment Of Electric Sets With Supports At The Flywheel Housing / Installation Of A New Generator Or Flexible Plates
Adjustments
From a Caterpillar service manual covering: 3208, 3304, 3306B, 3406, 3408C, 3412, 3412C, 3508, 3512, 3516, D330, D333…. Check it applies to your exact model before use.
Applies to: Caterpillar 3208, Caterpillar 3304, Caterpillar 3306B, Caterpillar 3406, Caterpillar 3408C, Caterpillar 3412, Caterpillar 3412C, Caterpillar 3508, Caterpillar 3512, Caterpillar 3516
Procedure
- Loosen all bolts connecting base to foundation; loosen all bolts fastening engine supports and generator supports to base.
- Ensure enough clearance between bolts and bolt holes in base, engine supports, generator supports at all locations.
- Check clearance between base and foundation at all mounting locations; use shims to prevent deflection; tighten base-to-foundation bolts to final torque.
- While generator supported by crane, loosen all bolts (2) fastening generator to flywheel housing; tighten alternate bolts to final torque; check clearance between base and engine and generator support
- Tighten all bolts fastening engine supports and generator supports to base to half of final torque; loosen all bolts (2); measure gap between generator and flywheel housing; ensure bolts centered in c
- Gaps at (E), (F), (G), (H) should be more than 0.03 mm (0.001 inch) and less than 0.13 mm (0.005 inch); adjust shims or move rear of generator right or left.
- After shim correction, tighten generator support bolts to half of final torque 450 N-m (332 Ib ft); check gaps; repeat until 0.13 mm (0.005 inch) or less; begin with Step 5.
- Install dial indicator on base with tip next to support mounting bolt (4); put tip on support (3); check while tightening bolt to final torque; if indicator moves more than 0.13 mm (0.005 inch), insta
Tools required
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- more than 0.03 mm (0.001 inch) and less than 0.13 mm (0.005 inch)
- 450 N-m (332 Ib ft)
- 0.13 mm (0.005 inch)
Full service-parts list: Caterpillar 3208 →, Caterpillar 3304 →, Caterpillar 3406 →, Caterpillar 3408C →, Caterpillar 3412 →, Caterpillar 3412C →, Caterpillar 3508 →, Caterpillar 3512 →, Caterpillar 3516 →
Source: Caterpillar service manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.