Perkins — How to Adjust the Boom Extend/Retract Cables

Adjustments

From a Perkins service manual covering: 404F-22, 5046D, 5606A, 804D-33, S8015-12264, S8016H-13642, S80X15-12264, S80X16H-13642, S8515-12264, S8516H-13642. Check it applies to your exact model before use.

Browse Perkins generators & specs →

Procedure

1. Start the engine from ground controls, raise the boom to horizontal, fully retract the boom, stop the engine.
2. Remove the boom end cover retaining fasteners and remove the cover.
3. Inspect the threaded ends of the boom extend cables; threads must be clean and undamaged.
4. Loosen the retract cable adjustment nut at the platform end of boom tube #1. Do not remove it.
5. Loosen the nylock nuts and jam nuts on the cable tension equalizer bracket.
6. Adjust the extend cable adjustment nut to obtain 6 3/8 inches/16.2 cm to 6 1/2 inches/16.5 cm between boom tube #2 and boom tube #3.
7. Extend the boom until there is approximately 3 feet / 1 m of travel left. Do not fully extend.
8. Torque the retract cable adjustment nut to 32-36 ft lbs / 43-49 Nm using gentle, steady torque.

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.

More Perkins repair guides →