Page 1585 of 6020

6C-44 FUEL SYSTEM (4JK1/4JJ1)
Fuel Tube / Quick - Connector Fittings
Precautions
• Do not light a match or create a flame.
• Keep flames away from your work area to prevent
flammable materials from catching fire.
• Disconnect the battery ground cable to prevent
electrical shorts.
• Pre −treat the piping system or associated parts
from thermal damage or from spattering when
welding or similar heat −generating work.
Cautions During Work
Do not expose the assembly to battery electrolyte or do
not wipe the assembly with a cloth used to wipe off spilt
battery electrolyte.
Piping that has been splattered with battery electrolyte
or battery electrolyte soaked cloth that was wiped on the
piping cannot be used.
140R100032
Legend
1. O-ring
2. Port
3. Connector
4. Plastic Tube
Removal
1. Open the fuel cap to relieve the fuel pressure in
the tank. Use compressed air to remove any dirt
on the fuel quick connect fittings prior to
disconnecting the fittings. W hen disconnecting the
fuel pipe, cover the area with a cloth to prevent
fuel from splashing as the fuel pipe may still have
some pressure in it.
140R100002
2. For removal of the quick connector, hold the quick
connector in one hand, and pull out the connecto
r
with the other hand while pressing the square
release button of the connector, as illustrated.
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Page 1586 of 6020

FUEL SYSTEM (4JK1/4JJ1) 6C-45
Note: Do not use tools of any kind. Only use bare hands
when disconnecting the connector. Use a lubricant (light
oil) and/or push and pull the connector until the pipe is
disconnected.
140R100037
Cover the connectors that were removed with a plastic
bag, to prevent dust or rain water from entering.
140R100028
Reuse of Quick-Connector
•
Replace the port and connector if a scratch, dent
or crack is found.
• Remove any dirt build up on the port when
installing the connector. Replace the connector, i
f
there is any rust, dents or scratches.
• After cleaning the port, insert it straight into the
connector until it clicks. After it clicks, try pulling it
out at 49 N (5 kg / 11 lb) to make sure that it is not
drawn and is securely locked.
140R100036
Assembling Advice
By applying engine oil or light oil to the pipe, port makes
pipe assembly easier. The pipe assembly should take
place immediately after applying oil (to prevent dust
from sticking to the pipe surface - which may decrease
sealing ability).
Test/Inspection After Assembling
1. Reconnect the battery negative cable.
2. Start the engine and observe the engine idle speed. The presence of dirt in the fuel system ma
y
affect the fuel injection system.
3. Check for fuel leakage from the connector.
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Page 1587 of 6020

6C-46 FUEL SYSTEM (4JK1/4JJ1)
Filler Neck
Removal
1. Remove the fuel tank.
Note: Refer to "Fuel Tank" in this section. 2. Put a marking on the following points as the fille
r
neck assembly is restored.
• Each joint area of the hose (to restore axial
direction and insertion length of the hose)
• Each fasten area of the clamp (to restore axial
direction and position of the clamp)
• Each bolt in the clamp (to restore fasten length
of bolt in the clamp)
• The band clip (to restore position and fasten
length of the band clip)
Note: Cover end of each hose and pipe to prevent an
y
dust entering.
Installation
1. Align each marking and restore the following point. • Each joint area of the hose (Restore axial
direction and insertion length of the hose)
• Each fasten area of the clamp (Restore axial
direction and position of the clamp)
Tightening torque: 2.5 N·m (0.25 kg ⋅
⋅⋅
⋅
m /21.7 lb in)
Filler neck side except flat deck model.
• Each bolt in the clamp (Restore fasten length o
f
bolt in the clamp)
Tightening torque: 2.5 N·m (0.25 kg ⋅
⋅⋅
⋅
m /21.7 lb in)
Filler neck side except flat deck model.
• The band clip (Restore position and fasten
length of the band clip)
2. Install the fuel tank.
Note: Refer to "Fuel Tank" in this section.
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Page 1588 of 6020
FUEL SYSTEM (4JK1/4JJ1) 6C-47
Fuel Filler Cap
General Description
A vacuum valve and pressure valve are built into the
fuel filler cap which adjusts the fuel pressure in the fuel
tank to prevent fuel tank damage.
RTW 46CSH000301
Legend
1. Seal Ring
Inspection
The fuel filler cap must be inspected for seal condition.
The fuel filler cap must be replaced if found defective.
Note: A replacement fuel filler cap must be the same as
the original. The fuel filler cap valve was designed
primarily for this application and must be replaced with
the same type or decreased engine performance ma
y
occur.
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Page 1589 of 6020

ENGINE ELECTRICAL (4JK1/4JJ1) 6D-1
SECTION 6D
ENGINE ELECTRICAL
TABLE OF CONTENTS
Charging System ................................................ 6D-2
Servicing Cautions .......................................... 6D-2
Important Generator Components and
Function.......................................................... 6D-2
Troubleshooting .............................................. 6D-5
Diagnosis......................................................... 6D-7
Specifications .................................................. 6D-8
Unit Se rv ic ing (4 JJ 1) ....................................... .... ..6D -9
Disassembly .................................................... 6D-10
Inspection and Repair ..................................... 6D-11 Rotor Assembly ........................................... 6D-11
Stator Coil .................................................... 6D-12
Brushes ....................................................... 6D-12
Rectifier ....................................................... 6D-13
Regulator Assembly..................................... 6D-13
Measuring Procedure .................................. 6D-13
Reassembly..................................................... 6D-14
Final Assembly ................................................ 6D-14
Starter Motor ...................................................... 6D-15 Starting Circuit Diagram .................................. 6D-15
Removal and Installation ................................. 6D-15 Important Operations – Removal................. 6D-15
Important Operations – Installation.............. 6D-15
Disassembly .................................................... 6D-16 Disassembly Steps ...................................... 6D-16
Important Operations ................................... 6D-17
Inspection and Repair ..................................... 6D-20 Armature ...................................................... 6D-20
Yoke............................................................. 6D-21
Brush and Brush Holder .............................. 6D-22
Overrunning Clutch...................................... 6D-22
Bearing ........................................................ 6D-23
Reassembly..................................................... 6D-24 Reassembly Steps ....................................... 6D-24
Important Operations ................................... 6D-25
Inspection After Assembly ........................... 6D-26
Magnetic Switch .............................................. 6D-27
Torque Specifications...................................... 6D-28
Pre-Heating System ........................................... 6D-29 Inspection and Repair ..................................... 6D-29 Visual Check................................................ 6D-29
Glow Relay .................................................. 6D-29
Glow Plug .................................................... 6D-29
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Page 1590 of 6020

6D-2 ENGINE ELECTRICAL (4JK1/4JJ1)
Charging System
Servicing Cautions
• Battery polarity is important. If the battery cables
are reversed, the generator diodes will be
destroyed.
• Do not remove the battery cables or the charging
circuit wiring when the engine is running.
• Confirm that the terminal wires are connected to
the proper terminals by checking the terminal
numbers (the number on the terminal wire and the
terminal must be the same).
• Disconnect the battery negative cable (-) before
inspecting the generator.
• Do not open or close the battery relay switch when
the engine is running.
• Disconnect the battery negative cable (-) when
using external equipment (Quick-Charge) to
charge the battery.
• W hen steam cleaning or washing the engine, do
not allow steam or water to come in direct contact
with the battery and other electrical system
components.
• Be sure to read the item on belt tension
adjustment before beginning the procedure.
Important Generator Components
and Function
• The generator used on 4JK1 engine cannot be
disassembled.
• The generator uses a built-in solid-state IC voltage
regulator. The regulator and other important
components together with their connections are
shown in the illustration.
• The voltage regulator is installed to the rear cove
r
assembly of the generator together with the brush
holder and the rectifier. The generator requires no
additional voltage regulation.
• 9 diodes are connected to the stator coil to convert
AC to DC. The DC voltage is delivered to the
generator output terminal.
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Page 1591 of 6020
ENGINE ELECTRICAL (4JK1/4JJ1) 6D-3
AC Generator (4JK1)
RTW 56DMF000501
AC Generator (4JJ1)
RTW 76DMF000101
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Page 1592 of 6020
6D-4 ENGINE ELECTRICAL (4JK1/4JJ1)
Charging System (4JK1)
RTW 56DMF000601
Charging System (4JJ1)
RTW 56DMF000101
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