Perkins 1104 — Pistons and Connecting Rods - Install

Maintenance

For the Perkins 1104, from the Perkins service manual.

Applies to: Perkins 1104, Perkins N H1 (Engine) engine

Procedure

1. If connecting rod caps temporarily installed, remove them; clean components.
2. Apply clean engine oil to cylinder bore, piston rings, piston outer surface, and connecting rod bearings.
3. Rotate crankshaft until crankshaft pin is at bottom center; lubricate pin.
4. Ensure piston ring gaps are 120 degrees apart; install piston ring compressor onto piston.
5. Push piston and connecting rod assembly into cylinder bore and onto crankshaft pin.
6. Install connecting rod cap; ensure etched numbers match.
7. Install new bolts; tighten evenly to 18 N·m (13 lb ft).
8. Tighten bolts evenly to 70 N·m (52 lb ft).
9. Turn bolts additional 120 degrees.
10. Ensure installed assembly has tactile side play; rotate crankshaft to check no binding.
11. Repeat for remaining pistons and connecting rods.
12. Check height of pistons above top face of cylinder block.

Full service-parts list: Perkins 1104 →

Source: Perkins 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.

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