Taylor THDC-954, Руководство по обслуживанию

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1-11 1-11 THDC / THDCP - 954 / 955 / 974 (Rev. 06/03) THDC / THDCP - 954 / 955 / 974 (Rev. 06/03)
Engine Troubleshooting Engine Troubleshooting (Cummins QSM11-C330) (Cummins QSM11-C330)
(Illus (Illustration tration 1-6) 1-6)
The following chart includes some of the problems The following chart includes some of the problems
that an operator may encounter during the service
that an operator may encounter during the service
life of a Cumm
life of a Cummins diesel engi ins diesel engine. ne. Always c Always check heck
the easiest and obvious things first, such as the the easiest and obvious things first, such as the
master disconnect switch, the neutral start switch,
master disconnect switch, the neutral start switch,
an empty fuel tank, closed fuel shut off, dead bat-
an empty fuel tank, closed fuel shut off, dead bat-
tery or corr
tery or corroded terminal oded terminals. s. Study the problem Study the problem
thoroughly before starting to work on the engine. thoroughly before starting to work on the engine.
Ask Ask yourself yourself the the following following questions. questions.
1. 1. What w What were the wa ere the warnin rning signs pr g signs preced eceding the ing the
trouble? trouble?
2. 2. Has t Has the engin he engine been sub e been subjec jected to re ted to recent cent
repair or maintenance? repair or maintenance?
3. 3. Has a si Has a simil milar tro ar trouble oc uble occur curred befo red before? re?
4. 4. If the engi If the engine sti ne still run ll runs, is i s, is it safe to con t safe to contin tinue ue
operation of the engine in an effort to diag- operation of the engine in an effort to diag-
nose the trouble? nose the trouble?
Check the items most easily and inexpensively Check the items most easily and inexpensively
corrected before proceeding to the more difficult,
corrected before proceeding to the more difficult,
time consum
time consuming and expensiv ing and expensive items. e items. After a After a
malfunction has been corrected, locate and cor- malfunction has been corrected, locate and cor-
rect the cause of the trouble to prevent recurrence
rect the cause of the trouble to prevent recurrence
of the same trouble.
of the same trouble.
P Prro ob blle em m C Ca au us se e C Co orrrre ec cttiio on n
1. 1. Air Air com compres pressor sor air air
pressure rises pressure rises
slowly
slowly
1. 1. Intake ai Intake air re r restric striction to tion to air c air compres- ompres-
sor is sor is excess excessive. ive.
2. 2. Air Air sys system tem leak leaks. s.
3. 3. Car Carbon buil bon buildup exc dup excessi essive in the ai ve in the airr
discharge line. discharge line.
1. 1. Rem Remove ove res restri tricti ction. on.
2. 2. Chec Check for ai k for air comp r compres ressor gas sor gasket, ket,
hoses, and fi hoses, and fitting leak tting leaks. s. Check for Check for
safety p safety pressure v ressure valve leaks alve leaks. . Rat- Rat-
ing must be 135 psi. ing must be 135 psi.
3. 3. Chec Check val k valve or c ve or cyli ylinder h nder head for ead for
carbon buildup and remove. carbon buildup and remove.
4. 4. Cont Contact a C act a Cumm ummins A ins Author uthorized ized
Repair Facility. Repair Facility.
2. 2. Air Air com compres pressor sor
cycles frequently cycles frequently
1. 1. Air Air sys system tem leak leaks. s.
2. 2. Car Carbon buil bon buildup is ex dup is exces cessiv sive in the e in the
air discharge line, check valve, or air discharge line, check valve, or
cylinder head.
cylinder head.
3. 3. Air c Air compr ompress essor pum or pumping ti ping time is me is
excessive. excessive.
1. 1. Bloc Block th k the tr e truck’ uck’s w s wheels heels. . Ins Inspect pect
the air system for leaks with the the air system for leaks with the
parking brakes applied and re-
parking brakes applied and re-
leased.
leased. Check for Check for leaks fr leaks from the om the
air compressor gaskets and the air air compressor gaskets and the air
system hoses, fittings, and valves. system hoses, fittings, and valves.
2. 2. Chec Check for air d k for air disc ischarge l harge line, ch ine, check eck
valve, and cylinder head for carbon valve, and cylinder head for carbon
buildup.
buildup. Replace t Replace the air c he air compres- ompres-
sor discharge line if required. sor discharge line if required.
3. 3. Repl Replace the des ace the desicc iccant car ant cartri tridge in dge in
the air dry the air dryer (if equi er (if equipped). pped). Check Check
the air compressor duty cycle. the air compressor duty cycle.
4. 4. Cont Contact a C act a Cumm ummins A ins Author uthorized ized
Repair Facility. Repair Facility.
3. 3. Air Air com compres pressor sor
noise is noise is excess excessive ive
continued continued
1. 1. Car Carbon buil bon buildup exc dup excessi essive in the ai ve in the airr
discharge line. discharge line.
1. 1. Ref Refer to Co er to Corre rrecti ction 3. of Pr on 3. of Proble oblem m
1. of this troubleshooting chart. 1. of this troubleshooting chart.
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