REV CSection 4 • Repair ProceduresJune 2005Part No. 52075 TMZ-34/19 4 - 43MANIFOLDS7-4Valve CoilsHow to Test a CoilA properly functioning coil provides anelectromotive force which operates the solenoidvalve. Critical to normal operation is continuitywithin the coil that provides this force field.Electrocution hazard. Contact withelectrically charged circuits couldresult in death or serious injury.Remove all rings, watches andother jewelry.1 Tag and disconnect the wire harness from thecoil to be tested.2 Test the coil resistance.Result: The resistance should be withinspecification, plus or minus 30%.Result: If the resistance is not withinspecification, plus or minus 30%, replace thecoil.Valve coil resistance specificationsDescription SpecificationSolenoid valve, 2 position 2 way 29 - 31Ω24V DC (schematic items A, B and C)Proportional solenoid valve, N.C. 31.5 to 33.5Ω24V DC (schematic item E)Solenoid valve, 3 position 4 way N.C. 23 to 25Ω20V DC (schematic item H)Solenoid valve, 2 position 3 way 23 to 25Ω20V DC (schematic item K)Solenoid valve, 3 position 4 way N.C. 23 to 25Ω20V DC (schematic item L)Solenoid valve, 2 position 2 way 29 - 31Ω24V DC (schematic items M, N, O and P)800-610-4101ActionRental.com
