Perkins — How to Test a Coil
Testing & diagnosis · Valve coil
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
- Electrocution/burn hazard. Contact with electrically charged circuits could result in death or serious injury.
Procedure
- Tag and disconnect the wiring from the coil to be tested.
- Test the coil resistance.
- Result: The resistance should be within specification, plus or minus 30%.
- Result: If the resistance is not within specification, plus or minus 30%, replace the coil.
Tools required
- Ohmmeter Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Proportional solenoid valve (SE, SF, SR) 4.8 ohm
- 2 position 3 way solenoid valve (SJ, SK) 6.3 ohm
- 2 position 2 way solenoid valve (SP, SQ) 5.9 ohm
- 3 position 4 way solenoid valve (EB, EF, EH, SI, SL) 6.3 ohm
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.