Perkins 403F-11 — Governor - Adjust
Adjustments · governor / front housing
For the Perkins 403F-11, from the Perkins service manual.
Applies to: Perkins 403F-11
Before you start
- The engine must be in running condition to carry out the governor adjustment procedure.
- If the engine is fitted with a Boost Compensation Device contact an authorized Perkins distributor.
Procedure
- Operate engine to normal operating temperature and record low idle rpm.
- Accelerate to high idle and record rpm as Speed A.
- Remove tamper proof caps; record protrusion X of high idle stop screw and protrusion Y of low idle stop screw.
- Release locknut, turn high idle trimmer screw four turns counterclockwise, tighten locknut.
- Accelerate to high idle and record rpm as Speed B.
- Set fuel screw using Tooling (A) to 2.00 ± 0.01 mm and tighten locknut to 6 N·m.
- Set stop screw protrusions to original dimensions and set high idle trimmer screw two turns clockwise from fully out.
- Run at low idle and adjust low idle stop screw to previously recorded speed.
- Run at high idle and adjust high idle stop screw to Speed B.
- Adjust high idle trimmer screw to Speed A and tighten locknut.
- Install tamper proof caps.
Tools required
- 21825617 Dial Indicator Amazon
- 27610331 Dial holder Amazon
- 27610332 Adapter for cylinder block Amazon
- 27610333 Calibration spring Amazon
- Allen head screw (M4 x 20 mm x 0.70) Amazon
- Optical Tachometer Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- 2.00 ± 0.01 mm (0.0787 ± 0.0004 inch)
- 6 N·m (55 lb in)
- 0.4 N·m (3.5 lb in)
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.