Use and Care Manual

Tsurumi’s Operation, Service, and Repair Manual
Description and Operation
14
(c) The generator and engine are installed on crossover plates that form the
base of the tubular frame. Vibration isolators support the generator and
engine unit. The isolators are fitted with threaded studs that secure the
generator and engine unit to the frame.
(2) Description of Generator
(a) The generator consists of a front bracket, intermediate N-bracket, stator
assembly and cover, rotor, rear bracket and bracket cover.
(b) The rear bracket of the generator attaches to the engine and this unit forms the
generator-to-engine interface.
(c) The front bracket has a series of slots that allow entry of cooling air into the
generator. A fan on the rotor circulates air through the generator.
(d) The rear bracket has mounting lugs that are the generator-to-frame attachment
points. The rear bracket provides support for a ball bearing at the back end of the
generator rotor.
(e) The rotor consists of a shaft, a stack of steel laminations, and copper wire
windings. Components mounted on the rotor include a surge absorbing diode, a
bridge diode, two permanent magnets, and a cooling air fan.
(f) The windings and the laminated steel core form the field coil. The permanent
magnets are used to induce voltage in the main coil of the stator. The diode and
the surge absorber are located under the rotor windings at the bearing end of the
rotor shaft.
(g) The rotor is attached to the engine crankshaft with a through bolt (tie-bolt). The
engine crankshaft is tapered and mates with a tapered bore in the rotor shaft.
The clamping force applied to the through bolt ties the rotor shaft to the engine
crankshaft.
(3) Description of the Engine
NOTE: Refer to the Honda Owner’s Manual for Models GX160, GX240, GX340, and GX390 for additional
coverage of the engine.
(a) The TPG4-7000HDXE portable generator has an electric starter and a
recoil starter. All other models of portable generators are equipped with a
recoil starter.
(b) The engine is equipped with an air filter to remove airborne contaminants from
the engine inlet air.
(c) The engine is fitted with a muffler that provides quiet operation and controls the
flow of engine exhaust gases. The muffler is attached to the rear generator cover
using a muffler mounting bracket.
(d) The muffler for Models TPG4-4500HDX, TPG4-6000HDX, TPG4-7000HDX and
TPG4-7000HDXE expels exhaust gases through a port in the side of the muffler.
The muffler for Model TPG4-3000HDX has a smaller muffler that expels gases
through a curved tube on the bottom of the muffler.