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LPG FUEL SYSTEM
AISAN CLOSED-LOOP
S/H1.50-2.00XMS (S/H25-40XMS) [D010, E001]; S/H2.00-3.20XM (S/H40-65XM) [D187, H177]

SAFETY PRECAUTIONS MAINTENANCE AND REPAIR
When lifting parts or assemblies, make sure all slings, chains, or cables are correctly fastened, and that the load being lifted is balanced. Make sure the crane, cables, and chains have the capacity to support the weight of theload. Do not lift heavy parts by hand, use a lifting mechanism. Wear safety glasses. DISCONNECT THE BATTERY CONNECTOR before doing any maintenance or repair on electric lift trucks. Disconnect the battery ground cable on internal combustion lift trucks.

Always use correct blocks to prevent the unit from rolling or falling. See HOW TO PUT THE LIFT TRUCK ON BLOCKS in the Operating Manual or thePeriodic Maintenance section. Keep the unit clean and the working area clean and orderly. Use the correct tools for the job. Keep the tools clean and in good condition. Always use HYSTER APPROVED parts when making repairs. Replacement parts must meet or exceed the specifications of the original equipment manufacturer. Make sure all nuts, bolts, snap rings, and other fastening devices are removedbefore using force to remove parts. Always fasten a DO NOT OPERATE tag to the controls of the unit when making repairs, or if the unit needs repairs. Be sure to follow the WARNING and CAUTION notes in the instructions. Gasoline, Liquid Petroleum Gas (LPG), Compressed Natural Gas (CNG), and Diesel fuel are flammable. Be sure to follow the necessary safety precautions when handling these fuels and whenworking on these fuel systems. Batteries generate flammable gas when they are being charged. Keep fire and sparks away from the area. Make sure the area is well ventilated. NOTE: The following symbols and words indicate safety information in this manual:

WARNING
Indicates a condition that can cause immediate death or injury!

CAUTION
Indicates a condition that can cause property damage!TABLE OF CONTENTS
General Description and Operation Fuel Tank Oxygen Sensor Regulator Start Mode Idle Mode Run Mode Resonator Carburetor Start Mode Idle Mode Run Mode Governor Hoses Replacement LPG Tank Repair Remove Install Relief Valve Repair Remove and Install Carburetor Repair Remove Disassemble Clean Assemble

Install Fuel Injector Repair Remove Clean and Inspect Install Governor RepairRemove Inspect Install Regulator Repair Remove Install Oxygen Sensor Repair Remove and Install Vacuum Switches Repair Remove and Install Inspect Resistor Repair Remove and Install Inspect Carburetor and New Regulator Adjustment Idle Speed and Fuel Mixture Idle Control Adjustment Governor Checks and Adjustments Checks Adjustments Throttle Linkage Adjustment MONOTROL Pedal Check Check Engine LightInspect Warning Lamp Check Feedback Operation Check VAC1 and VAC2 Signals Check Resistor Check Fuel Injector Check Oxygen Sensor Check Vacuum Switch 1 Check Vacuum Switch 2 After Completing Checks Troubleshooting

This section is for the following models: S/H1.50-2.00XMS (S/H25-40XMS) [D010, E001]; S/H2.00-3.20XM (S/H40-65XM) [D187, H177]

General
This section has the description, operation,and repair procedures for the parts of the LPG fuel system used on the Mazda 2.0 liter, Mazda 2.2 liter, and GM 3.0L Engines.

Description and Operation

The LPG fuel system has a fuel tank and valve, hydrostatic relief valve, regulator, carburetor, solenoid valve, makeup fuel injector, fuel pressure sensor and indicator lamp, and governor. The LPG arrangement is shown in Figure 1 and Figure2.

FUEL TANK
NOTE: Some LPG tanks have an auxiliary fill fitting instead of a plug. The fuel tank is the reservoir for the LPG system. See Figure 3. The fuel tank keeps the fuel in the liquid condition. The pressure of the fuel is 900 to 1100 kPa (130 to 160 psi) with 100% propane when the tank is full and at an ambient temperature of 27° (81° The tank has a C F). pressure relief valve that...
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