Wisconsin VH4D Engine

The cheapest captured merchant offer per filter — see the full cross-reference below for every OEM/aftermarket option.

Prices captured from merchant listings; some links are affiliate links. Verify against your serial number before ordering.

• Low/No Charge
  Cause: Test 2.0 2.1 Proceed with Test 1.0 and 1.1. It is necessary to slightly discharge battery to make system work. With engine running at full RPM, check battery voltage with DC Voltmeter. If the charge rate increases -- 2.3 If system does not charge 2.4 If charge rate increased with regulator disconnected. 2.5 If charge rate does not increase with regulator disconnected.
  Fix: 2.2 Alternator functioning properly. [Battery was fully charged. 2.3 Operate engine with regulator disconnected (continue with Test 2.4). 2.4 Regulator was at fault. Replace regulator module, - static check regulator per Test No. 5.1. 2.5 Regulator not at fault. Check Rectifier per Test 3.0, 3.1 or static check per Test 6.0.
• Battery Overcharge
  Cause: Test 1.0 Engine not running check battery with DC Voltmeter. I. 1 If voltage is greater than 13.5 volts 1.2 With engine running at full RPM, check battery voltage with DC Voltmeter. I. 3 If the charge increases beyond 13.5 volts. 1.4 If the charge remains under 13.5 volts.
  Fix: 1.1 Place 12 volt light bulb or carbon pile across battery to reduce voltage to below 13.5 volts. 1.3 Faulty regulator, replace, -- static check regulator per 'rest No. 5.1.' 1.4 Alternator functioning properly. Check battery condition.

Compiled from service & troubleshooting documentation across every generator set that uses the Wisconsin VH4D.

Pooled from every document that names this exact engine — confirm the interval and part number against your unit's serial number.

Parts listed by aftermarket suppliers as fitting this engine — leads compiled from supplier catalogs; verify the exact part for your serial number.

• Air filter: Wisconsin LO177 Wisconsin LO189 Donaldson P181050 Donaldson P181052 Wix 42276 Ac Delco PC138K Wix 42222 Ac Delco A1430C
• Fuel filter: Donaldson P550012 Donaldson P555095 Donaldson P550094 Wix 33032 Ac Delco GF142 Wix 33195 Ac Delco TP1227 Wix 33031
• Oil filter: Wisconsin RV27A Wisconsin F140L4030 Donaldson P553634 Donaldson P550117 Donaldson P550203 Wix 51758 Ac Delco PF828 Wix 51503

Cross-referenced via Donaldson + OEM/engine-maker interchange — options to verify against your serial number, not confirmed for every exact variant.

• Ditch Witch 2300 — Trencher
• Ditch Witch R30 — Trencher
• Ditch Witch V30 — Trencher
• Ford CL-30 — Skid Steer Loader
• Gehl HL3030 — Skid Steer Loader
• Gehl HL4400 — Skid Steer Loader
• New Holland L425 — Skid Steer Loader
• New Holland L445 — Skid Steer Loader
• New Holland L452 — Skid Steer Loader
• Raygo ROMPER 2-36 — Compactor
• Vermeer T300A — Trencher
• Vermeer V430A — Trencher

Other equipment known to use this engine, via filter-application cross-reference — useful for sourcing parts even when your exact machine isn't listed elsewhere on this page.