Perkins — How to Install the Flex Plate
Repair & overhaul
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.
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Before you start
- Component damage hazard. Do not force the drive pump during installation or the flex plate teeth may become damaged.
Procedure
- Install the flex plate onto the engine flywheel with the raised spline towards the pump; apply Loctite removable thread sealant to the screws.
- Torque the flex plate mounting bolts in two stages (Continental 20.8 ft-lbs / 28 Nm; Deutz and Perkins 28 ft-lbs / 38 Nm then 40 ft-lbs / 54 Nm).
- Install the pump coupler onto the pump shaft with the set screw toward the pump; leave the appropriate gap.
- Apply Loctite removable thread sealant to the pump coupler set screw and torque to 61 ft-lbs / 83 Nm.
- Install the pump onto the pump mounting plate; apply Loctite and torque the pump retaining fasteners to 57 ft-lbs / 77 Nm.
- Install the pump and pump mounting plate assembly onto the engine; apply Loctite to the mounting screws.
Tools required
- Torque wrench Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Flex plate mounting bolts Continental 20.8 ft-lbs / 28 Nm
- Flex plate mounting bolts Deutz/Perkins 28 ft-lbs / 38 Nm then 40 ft-lbs / 54 Nm
- Pump coupler set screw 61 ft-lbs / 83 Nm
- Pump retaining fasteners 57 ft-lbs / 77 Nm
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.