Doosan D50S-5 Operation & Maintenance Manual page 184

the engine is running. the engine is running.
If abnormally soft lines are detected, replace as If abnormally soft lines are detected, replace as
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necessary. necessary.
6 6
3 3
(1) LP fuel lock-off, (1) LP fuel lock-off,
(2) LP regulator/converter (2) LP regulator/converter
(3) Fuel Trim Valve(FTV) : G643E only) (3) Fuel Trim Valve(FTV) : G643E only)
(4) LP mixer (4) LP mixer
(5) Vacuum lines, (5) Vacuum lines,
(6) Coolant lines, (6) Coolant lines,
(7) LP fuel line (7) LP fuel line
Maintenance Section Maintenance Section
Every 1000 Service Hours or 6 Months Every 1000 Service Hours or 6 Months
You must read and understand the warnings and instructions contained in the Safety section of this manual, You must read and understand the warnings and instructions contained in the Safety section of this manual,
before performing any operation or maintenance procedures. before performing any operation or maintenance procedures.
Carburetor (LP - Gas Engine Only) Carburetor (LP - Gas Engine Only)
- Adjust, Clean - Adjust, Clean
If the engine is hard to start or the exhaust is If the engine is hard to start or the exhaust is
smoking, the carburetor may need cleaning and smoking, the carburetor may need cleaning and
adjusting. adjusting.
Before adjusting the carburetor make sure the Before adjusting the carburetor make sure the
engine is at normal operating temperature. Park the engine is at normal operating temperature. Park the
lift truck with the forks lowered, parking brake lift truck with the forks lowered, parking brake
applied, transmission in neutral and the engine applied, transmission in neutral and the engine
stopped. stopped.
For the complete procedure and specifications for For the complete procedure and specifications for
1 1
4 4
7 7
2 2
5 5
Inspect Electrical System (G643E Inspect Electrical System (G643E
Engine only) Engine only)
Check for loose, dirty or damaged connectors Check for loose, dirty or damaged connectors
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and wires on the harness including: Fuel lock-off, and wires on the harness including: Fuel lock-off,
TMAP sensor, O2 sensor, Electronic throttle, TMAP sensor, O2 sensor, Electronic throttle,
Control Relays, Fuel Trim Valve, Foot Pedal, Control Relays, Fuel Trim Valve, Foot Pedal,
and Distributor sensor. and Distributor sensor.
Repair and/or replace as necessary Repair and/or replace as necessary
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183 183
2. 2. Remove fuel filter cartridge assembly. Remove fuel filter cartridge assembly.
3. 3. Before installing a new cartridge assembly, Before installing a new cartridge assembly,
apply a small amount of clean fuel to the filter apply a small amount of clean fuel to the filter
cartridge gasket. cartridge gasket.
Do not fill fuel filters with fuel before installing them. Do not fill fuel filters with fuel before installing them.
Contaminated fuel will cause accelerated wear to Contaminated fuel will cause accelerated wear to
fuel system parts. fuel system parts.
4. 4. Install the new fuel filter cartridge assembly. Install the new fuel filter cartridge assembly.
NOTICE NOTICE