Cummins/Onan — Nozzle Installation
Installation · Injection nozzle
From a Cummins/Onan service manual covering: 2.5A, 2.5L, 2.7 AJ, 4.0CCK, 6.0CCKB, 6.5 NH, JC - 3CR / 96 T. Check it applies to your exact model before use.
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Before you start
- A dirty mounting surface could permit blow-by, causing nozzle failure and power loss.
Procedure
- Install a new heat shield to head gasket in cylinder head recess.
- Install heat shield, new nozzle gasket and nozzle adapter.
- Insert nozzle assembly into recess; do not stroke tip against any hard surface.
- Install nozzle flange and two cap screws, tightening alternately to avoid cocking, to 20-21 ft-lb (27-28 Nm).
Specs & values
- Nozzle flange cap screws 20-21 ft-lb (27-28 Nm)
Source: Cummins/Onan 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.