Taylor THDC-954, Руководство по обслуживанию

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THDC / THDCP - 954 / 955 / 974 (Rev. 06/03) THDC / THDCP - 954 / 955 / 974 (Rev. 06/03) 6-4 6-4
Component Component T Troubleshooting roubleshooting
Alternator. Alternator. The alternator provides 13.8 - 14.4 The alternator provides 13.8 - 14.4
VDC at 100 amps of power for the electrical sys- VDC at 100 amps of power for the electrical sys-
tem and trickle charges the battery when the
tem and trickle charges the battery when the
engine is being ope
engine is being operated. rated. When the alter When the alternator is nator is
started, it will output 6 VDC to a relay (K3), ener- started, it will output 6 VDC to a relay (K3), ener-
gizing the relay and taking away the ground from gizing the relay and taking away the ground from
the Battery light (DS3
the Battery light (DS3 ,, Illustration 6-16) on the Illustration 6-16) on the
instrum instrument ent panel. panel.
The most effective way to troubleshoot an alterna- The most effective way to troubleshoot an alterna-
tor is with an ammeter on the output of the alter-
tor is with an ammeter on the output of the alter-
nator
nator. . Another good check i Another good check is with a volt s with a voltmeter meter
across the batt across the battery ery. . With the engine oper With the engine operating at a ating at a
moderate speed, the voltmeter reading should moderate speed, the voltmeter reading should
never exceed 1
never exceed 15.5 VDC. 5.5 VDC. If reading ex If reading exceeds 15.5 ceeds 15.5
VDC, the alternator is defective and requires VDC, the alternator is defective and requires
replacing.
replacing. Should the al Should the alternator ternator output drop output drop
below 12 VDC, the alternator is defective and below 12 VDC, the alternator is defective and
requires
requires replaci replacing. ng.
Perform the following procedures below for abnor- Perform the following procedures below for abnor-
mal charging system operation. mal charging system operation.
1. 1. Insure Insure that the that the undercharged undercharged condition condition (below (below
12 VDC) has not been caused by accessories 12 VDC) has not been caused by accessories
having been left on for extended periods of
having been left on for extended periods of
time.
time.
2. 2. Chec Check the driv k the drive belt for prop e belt for proper tens er tension (re ion (refer to fer to
Alternator Drive Belt Tension Alternator Drive Belt Tension in in Section 1 Section 1 ). ).
3. 3. Ensur Ensure that bat e that battery i tery is good and c s good and capabl apable of e of
holding a charge. holding a charge.
4. 4. Insp Inspect t ect the wi he wiring ring for de for defect fects. s. Chec Check all k all con- con-
nections for tightness and cleanliness, includ- nections for tightness and cleanliness, includ-
ing the slip connectors at the alternator and
ing the slip connectors at the alternator and
connections at connections at the the battery battery..
5. 5. Wit With the igni h the ignition sw tion switc itch on and all wir h on and all wiring har ing har--
ness leads connected, connect a voltmeter ness leads connected, connect a voltmeter
from:
from:
a. a. alternator alternator “BA “BAT” te T” terminal rminal to ground to ground
b. b. alte alternat rnator #1 te or #1 term rminal t inal to grou o ground nd
c. c. alte alternat rnator #2 te or #2 term rminal inal to gro to ground und
An An infinity infinity reading reading indicates indicates an an open open circuit circuit
between the voltmeter connection and bat- between the voltmeter connection and bat-
tery
tery. . Repair i Repair if require f required. d.
6. 6. With al With all acces l accessories sories turned of turned off, connec f, connect a volt t a volt--
meter acr meter across the battery oss the battery. . Operate engine at Operate engine at
mode moderate spe rate speed. ed. If volt If voltage is 15.5 VDC or age is 15.5 VDC or
higher, replace the alternator. higher, replace the alternator.
Circuit Breakers. Circuit Breakers. Circuit breakers are employed Circuit breakers are employed
in the electrical system and act similar to fuses, in the electrical system and act similar to fuses,
protecting the electrical circuits and valuable com-
protecting the electrical circuits and valuable com-
ponents from overloads which could damage
ponents from overloads which could damage
them.
them. Perform t Perform the followi he following troubleshooti ng troubleshooting pro- ng pro-
cedures to troubleshoot a circuit breaker. cedures to troubleshoot a circuit breaker.
1. 1. Tur Turn the ignit n the ignition key ion key to the “ to the “Ignition” Ignition” position. position.
2. 2. If the cir If the circuit break cuit breaker is tr er is tripped, reset ipped, reset the circ the circuit uit
breaker. breaker.
3. 3. If the c If the circuit ircuit breaker breaker immedi immediately r ately retrips, etrips,
remove all wires from the output side (load remove all wires from the output side (load
side) of the circuit breaker.
side) of the circuit breaker.
4. 4. Res Reset the ci et the circu rcuit brea it breaker ker. . If the ci If the circu rcuit bre it breaker aker
retrips, the circuit breaker is bad and must be retrips, the circuit breaker is bad and must be
replaced.
replaced.
5. 5. If the cir If the circui cuit break t breaker main er maintai tains a set state, on ns a set state, one e
of the output circ of the output circuits is s uits is shorted. horted. Reconnect Reconnect
the wires one by one to the output side (load the wires one by one to the output side (load
side) until the cir side) until the circuit breaker tr cuit breaker trips. ips. Tr Trouble- ouble-
shoot the circuit of the wire, that tripped the shoot the circuit of the wire, that tripped the
circu
circuit breaker, for it breaker, for a a short. short.
6. 6. Isol Isolate and remo ate and remove the shor ve the short from th t from the circ e circuit. uit.
Automatic 90 amp Circuit Breaker Automatic 90 amp Circuit Breaker (Illustration (Illustration
1-5) 1-5) .. The automatic circuit breaker (CB1) is The automatic circuit breaker (CB1) is
located on the right s located on the right side of engine. ide of engine. It will aut It will automat- omat-
ically r ically reset itself if i eset itself if it trips. t trips. If the circui If the circuit breaker t breaker
cannot maintain a set state, perform the following cannot maintain a set state, perform the following
troubleshooting procedures to troubleshoot the
troubleshooting procedures to troubleshoot the
automatic circuit breaker.
automatic circuit breaker.
1. 1. T Turn the ig urn the igniti nition key to the Of on key to the Off posi f position tion..
2. 2. Rem Remove all w ove all wire ires from t s from the output s he output side (l ide (load oad
side) of the circuit breaker. side) of the circuit breaker.
3. 3. Tur Turn the ignit n the ignition key ion key to the “ to the “Ignition” Ignition” position. position.
If the circuit breaker retrips, the circuit breaker If the circuit breaker retrips, the circuit breaker
is bad and must be replaced.
is bad and must be replaced.
4. 4. If the cir If the circui cuit break t breaker main er maintai tains a set state, on ns a set state, one e
of the output circ of the output circuits is s uits is shorted. horted. Reconnect Reconnect
the wires one by one to the output side (load the wires one by one to the output side (load
side) until the cir
side) until the circuit breaker tr cuit breaker trips. ips. Tr Trouble- ouble-
shoot the circuit of the wire, that tripped the shoot the circuit of the wire, that tripped the
circu
circuit breaker, for it breaker, for a a short. short.
5. 5. Isol Isolate and remo ate and remove the shor ve the short from th t from the circ e circuit. uit.
Single- Single-Pole, Single-Th Pole, Single-Throw 30 row 30 amp Relays amp Relays
(Illustration 6-4) (Illustration 6-4) .. A relay is nothing more than an A relay is nothing more than an
electri electrically contr cally controlled switc olled switch. h. Relays are always Relays are always
shown on electrical circuits in a de-energized shown on electrical circuits in a de-energized
state.
state. The internal s The internal switch, c witch, common at pin 30, ommon at pin 30,
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