Facts About Generators
GeneratorsDirectoryCompareRepairEnginesControllersPartsManufacturersGuides
Search models or part #
Home›Repair guides›1

Cummins/Onan — 1

For these Cummins/Onan models: EGMBT, EGMBT (P4500), EGMBU, EGMBU (P5000E), EGMBU (P5000e), P24500 (Spec A), P5000e (Spec A).

Applies to: Cummins Onan Egmbt, Cummins Onan Egmbu

Procedure

  1. 1. Safety Precautions 10-2009 · Static electric sparks caused by fuel flowing through a service station pump nozzle can ignite gasoline. Never fill the generator set with a service station pump nozzle. Instead, fill a safety tank sitting on the ground and then slowly transfer fuel to the generator set from the safety tank. · DO NOT fill fuel tanks while the engine is running. A hot engine can ignite the fuel. · To prevent fire due to fuel leakage, always close the fuel valve and let the generator set cool before transporting it or storing it in a confined space. · DO NOT SMOKE OR ALLOW AN OPEN FLAME near the generator set. Keep flames, sparks, electrical switches, pilot lights, electrical arcs, arc-producing equipment, and all other sources of ignition well away.
  2. 1.3 Generator Voltage is Deadly · DO NOT CONNECT THE GENERATOR SET DIRECTLY TO ANY BUILDING ELECTRICAL SYSTEM. Back-feed could cause electrocution of utility line workers and could damage equipment. An approved switching device must be used to prevent interconnections. A trained and experienced electrician must make electrical connections when the generator set is used for emergency power. · Make sure clothing, shoes, and skin are dry when handling electrical equipment. · Never operate the generator set in rain or snow or when it is sitting on wet ground.
  3. 1.4 Moving Parts Can Cause Severe Personal Injury or Death · Before performing any maintenance on the generator set, disconnect the spark plug wire. · Always keep hands away from moving parts. · Do not wear loose clothing or jewelry while servicing the generator set. Loose clothing and jewelry can become caught in moving parts. Jewelry can short out electrical contacts causing sparks, flame, and electrical shock. · Make sure that fasteners and clamps on the generator set are tight. Keep guards in position over fans, rotors, etc.
  4. 1.5 Battery Gases Are Explosive · Wear safety glasses when servicing batteries. · Do not smoke. · To reduce arcing when disconnecting or reconnecting battery cables, always disconnect the negative (–) cable of the battery first and reconnect it last.
  5. 1.6 General Precautions · Keep children away from the generator set. · Wear hearing protection when near an operating generator set. 2 914-0508 (Issue 5)

Source: manual:914-0508 Onan EGMBT P24500 EGMBU P5000e (spec A) Portable Genset Service manual (10-2009).pdf. Figures and steps are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.