Hitachi CM 75EAP, CM 75EBP Service Manual
PRODUCT NAME
Hitachi Engine Cutter
Models CM 75EAP
CM 75EBP
International Sales Division
TROUBLESHOOTING GUIDE ----------------------------------------------------------------------------------------------- 1
1. Troubleshooting and correction ------------------------------------------------------------------------------- 1
REPAIR GUIDE ------------------------------------------------------------------------------------------------------------------ 3
1. Precautions on maintenance, inspection and repair ----------------------------------------------------- 3
2. Inspection criteria for each section and consumable parts --------------------------------------------- 3
CONTENTS
Page
LIST Nos.
CM 75EAP: F070
CS 75 EBP: F071
Sep. 2014
C
-1-
1. Troubleshooting and correction
Trouble Cause Corrective action
Starter
handle
cannot be
pulled.
The crank shaft does
not rotate.
Faulty piston ring
Disassemble and
replace.
Seized piston and cylinder
Faulty crank shaft bearings
Magneto rotor contact with ignition coil
Clogging of dirt in starter pawl Clean.
The recoil starter
does not rotate.
Broken recoil starter Inspect and replace.
Startup is
impossible.
No compression
Faulty piston ring
Replace.
Worn piston
Expired oil seal service life
Worn cylinder
Defective sealing of the packing
Decompression valve trouble
Clean or replace.
Short-circuited due to foreign matter between the spark plug
electrodes.
Remove foreign matter:
In case of frequent
occurrence, replace the
spark plug and clean.
No spark
Stop switch not at startup position Adjust to startup position.
Dirty or faulty spark plug
Clean or replace.
Improperly connected plug cap
Inspect and replace.
Disconnected or improperly connected
high voltage cord
Repair or replace.
Disconnected or faulty ignition coil
ass’y
Replace.
Large gap between the magneto rotor
circumference and ignition coil ass’y
Adjust.
The spark plug does
not become wet with
fuel after repeated
starting operation.
No fuel in the fuel tank
Add properly mixed fuel
(25:1 to 50:1).
Clogged fuel filter Clean or replace.
Faulty fuel pipe
Adjust, replace or
connect.
Faulty vent hole (tank cap inside plug)
on the fuel tank
Replace.
Faulty carburetor ass’y Adjust, clean or replace.
The spark plug is wet
due to excessive fuel
supplied.
Pulling the starter handle several
times with the choke button at the
“startup” position
Dry the spark plug.
Remove residual fuel
from inside the cylinder
and crank case.
Idling stops
although
startup is
possible.
Weak spark
Dirty or faulty spark plug Clean or replace.
Improper gap between the magneto
rotor circumference and ignition coil
ass’y
Adjust.
Low compression
Worn piston ring
Replace.
Expired oil seal service life
Decompression valve trouble Clean or replace.
Good spark and
compression
Revolutions too low for idling
Adjust.
Poorly adjusted carburetor ass’y
TROUBLESHOOTING GUIDE
-2-
Trouble Cause Corrective action
Starts, but
when
accelerating
…
The engine stalls.
Clogged fuel filter Clean or replace.
Insufficient warm-up Warm up.
Poorly adjusted carburetor ass’y
Adjust.
Poor acceleration;
no increase in
revolutions
Clogged cylinder vent passage,
exhaust port and/or carbon-clogged
muffler
Clean.
Clogged air cleaner
Poorly adjusted carburetor ass’y Adjust, clean or replace.
Starts, but
…
Fluctuating
revolutions at high
speed
Dirt-clogged high-speed fuel line of the
carburetor ass’y
Clean.
Defective sealing of the packing Replace.
Faulty carburetor ass’y Adjust, clean or replace.
Excessive fuel
consumption
Clogged air cleaner Clean.
Poorly adjusted carburetor ass’y Adjust.
Abnormal vibration
Improper wheel mounting Mount properly.
Loose tightening of handle and other
parts
Check and firmly tighten
the loose parts.
Bent or broken wheel Replace with a new one.
Engine is running, but the wheel
hardly moves or is slow.
Loose belt
Adjust belt tension.
High belt tension
Belt disengaged from pulley
Firmly engage belt with
pulley.
Blunt cutting
Loose belt Adjust belt tension.
Worn-out wheel Replace with a new one.
No water supply from water
supplier
Loose connection of joint with faucet
Firmly connect both
parts.
Clogged joint Clean.
Hose of 14 mm or less in bore Replace.
-3-
This section describes repair, focusing on portions requiring frequent repair. See the TROUBLESHOOTI NG
GUIDE in the previous section as the context for the following descriptions.
1. Precautions on maintenance, inspection and repair
• The fuel used readily ignites; therefore, never bring the product near a flame.
• Use new gaskets at reassembly.
• Prior to disassembly for repair, rem ove the fuel into separate containers, and allow the tool to cool down.
• During repair, startup or running, use adequate care for portions posing the risk of burn injury or electric
shock, such as hot areas including the muffler, high voltage cord, and spark plug.
• Before running the tool with the cut-off wheel attached, make sure that there are no other people nearby.
• Ensure proper ventilation when performing repair in a small room or other p oorly ventilated space.
2. Inspection criteria for each section and consumable parts
Model
Item
CM 75EAP CM 75EBP
Idling revolutions 2,500 ± 200 min-1
No-load maximum revolutions
(with cut-off wheel)
9,800 ± 400 min
-1
Clutch engagement 3,800 ± 300 min-1
Spindle revolutions 4,050 ± 150 min-1
Accelerating performance Smooth acceleration
Gap between magneto rotor
and ignition coil ass’y
0.2 to 0.4 mm
Spark plug NGK BPMR7A
Gap between spark plug
electrodes
0.6 to 0.7 mm
Diamond cutter dimensions
305 mm in outside dia.
20 mm in hole dia.
355 mm in outside dia.
20 mm in hole dia.
(A diamond cutter of 25.4 mm in hole dia. is available
when using the accessory adapter collar.)
Cut-off wheel dimensions
305 mm in outside dia.
20 mm in hole dia.
3.5 mm in thickness
355 mm in outside dia.
20 mm in hole dia.
4.0 mm in thickness
(A cut-off wheel of 25.4 mm in hole dia. is available
when using the accessory adapter collar)
Max. circumferential speed of
cut-off wheel
80 m/s 100 m/s
* This engine cutter controls the maximum speed to 9,800 ± 400 min-1 in order to prevent the cut-off wheel
from breaking. Therefore, the pulse-count type of t achometer used for detecting ignition plug firing pulses
cannot measure maximum speed. Use one of the following methods to measure maximum speed:
• Use a tachometer of the electromagnetic induction type for detecting the movement of magnetic steel in
the magneto rotor.
• Use a stroboscope or similar instrument to measure the cut-off wheel rotation (spindle speed). Make a
safety check before running the cut-off wheel, and be very careful to avoid injury.
REPAIR GUIDE
-4-
Broken piston ring
Replace.
Seized piston or cylinder
Seized or broken needle bearing of the crank
shaft
Seized or broken ball bearing of the crank
shaft
Magneto rotor contact with ignition coil Adjust.
Broken recoil starter Inspect/replace.
Clogging of dirt in starter pawl Clean.
Faulty piston ring Clean/replace.
Worn piston ring
Replace.
Worn piston
Worn or broken oil seal
Worn cylinder
Defective sealing of the packing
Decompression valve trouble
Ignition failure due to contaminant Clean (Remove contaminants.)
Stop switch not at startup position
Set to startup
position.
Dirty or faulty spark plug Clean/inspect.
Improperly connected plug cap
Inspect/replace.
Disconnected or improperly connected high
voltage cord and other wiring
Ground connection of high voltage cord and
other wiring
Inspect.
Disconnected or faulty ignition coil
Replace.
Improper gap between magneto rotor
circumference and ignition coil
Adjust.
No fuel in fuel tank
Add properly mixed
fuel (25:1 to 50:1).
Clogged fuel filter Clean/replace.
Bent fuel pipe Adjust.
Cracked fuel pipe Replace.
Disconnected fuel pipe Connect.
Faulty tank vent hole (tank cap inside plug)
Replace.
Faulty pump diaphragm of carburetor ass’y
Dirt-clogged carburetor ass’y Clean.
Poorly adjusted carburetor ass’y Adjust.
Pulling the starter handle several times with
the choke button at the “startup” position
Dry the spark plug.
Remove residual fuel
from cylinder and
crank case.
Repair flowchart
Pull the starter handle.
Is pulling possible?
Remove the spark plug to
check for sparks.
Are sparks generated?
Is there compression?
Return the spark plug
and plug cap to the
original positions, and
then perform proper
startup operation.
Is the tip of the spark plug
wet with fuel?
Is the spark plug wet due
to excessive supply of
fuel?
No
Yes
Yes
Yes
Yes
Yes
Is there any foreign
matter between the spark
plug electrodes?
No
Yes
No
No
No
No
-5-
Dirty or faulty spark plug Clean/replace.
Improper gap between magneto rotor
circumference and ignition coil
Adjust.
Worn piston ring
Replace.
Expired oil seal service life
Decompression valve trouble
Clean/replace.
Revolutions low for idling
Adjust.
Poorly adjusted carburetor ass’y
Revolutions low for idling
Adjust.
Poorly adjusted carburetor ass’y
Defective sealing of the packing Replace.
Revolutions too high for idling
Adjust.
Poorly adjusted carburetor ass’y
Worn or faulty clutch Inspect/replace.
Clogged fuel filter
Clean/replace.
Inadequate warm-up, especially in cold
weather
Warm up.
Poorly adjusted carburetor ass’y
Adjust.
Clogged cylinder vent passage, exhaust port
or carbon-clogged muffler
Clean.
Clogged air cleaner
Poorly adjusted carburetor ass’y
Adjust.
Faulty carburetor ass’y pump diaphragm
Replace.
Dirt-clogged carburetor ass’y
Clean.
Dirt-clogged high-speed fuel line of the
carburetor ass’y
Clean.
Air intake from the packing section Inspect.
Faulty carburetor ass’y pump diaphragm Replace.
Poorly adjusted carburetor ass’y Adjust.
Revolutions low for idling
Adjust.
Poorly adjusted carburetor ass’y
Clogged air cleaner Clean.
Poorly adjusted carburetor ass’y Adjust.
Does the engine stop when
rapidly decelerating from
high speed?
Yes
No
Yes
Does the engine stop by
pulling the throttle lever?
No
Does the speed increase
by pulling the throttle lever?
Do revolutions fluctuate
during acceleration?
Tilt the tool during idling.
Does the engine stop?
Does the cut-off wheel
rotate during idling?
Start the tool and set to
idling mode.
Does the engine stop?
Is fuel consumption
excessive?
Yes
No
Yes
Yes
No
Yes
Yes
No
No
No
No
Yes
-6-
Improper mounting of cut-off wheel Mount it adequately.
Loose tightening of handle and other parts
Firmly tighten the
loose parts.
Bent or broken cut-off wheel Replace.
Loose belt Adjust belt tension.
High belt tension Adjust belt tension.
Belt disengaged from pulley Engage adequately.
Poor connection of joint with faucet Connect.
Clogged joint Clean.
Hose of 14 mm or less in bore Replace.
Is there abnormal
vibration?
Is water supplied from the
water supplier?
Does the cut-off wheel
rotate?
No
Yes
Yes
No
No
-7-
• Spark plug
• Checking for sparks
High voltage cord
Ignited sparks
[142]
Plug cap
Metallic portion of the engine
[Bold] numbers in the descriptions below correspond to item numbers in the Parts List and exploded
assembly diagram for the Models CM 75EAP and CM 75EBP.
WARNING: Always stop the engine prior to disassembly or when replacing the cut-off wheel.
1. Checking for sparks of the spark plug
CAUTION:
• Be careful not to touch the metallic portion of Spark
Plug Ass’y BPMR7A [142] when pulling the starter
handle; otherwise, you run the risk of electric shock.
• Carefully wipe off any fuel around the plug to avoid a
sudden flash of fire.
(1) Remove Spark Plug Ass’y BPMR7A [142] from the Cylinder
[146]. Use a wire brush to clean off carbon deposits on the
electrodes of Spark Plug Ass’y BPMR7A [142], as needed.
Adjust the gap between the electrodes if necessary. Use a
cloth to wipe off any fuel on the electrodes. Remove fuel left
in the Cylinder [146], Crank Case (A) [6], and Crank Case
(B) [44] by following the procedure below.
(a) Remove the Spark Plug Ass’y BPMR7A [142] from the
Cylinder [146].
(b) Open the choke (with the Choke button [191] pushed in)
and set the Stop Switch [196] to the stop position.
(c) Open the throttle by pulling the Throttle Lever [134].
(d) Pull the starter handle several times.
(2) Insert Spark Plug Ass’y BPMR7A [142] into the Plug Cap
Cord [24] and place the electrodes in contact with the
metallic portion of the engine. Under these conditions, set
the Stop Switch [196] to the startup position and pull the
starter handle.
(3) When the above steps are all completed normally, the electrodes of Spark Plug Ass’y BPMR7A [142]
should make a snapping sound to generate sparks.
2. Adjustment of the carburetor
(1) Use the idle adjust screw to adjust the carburetor.
• Use this screw to adjust the revolutions at idling. T urning the
screw clockwise increases engine revolutions; turning it
counterclockwise decreases engine revolutions.
(2) Standard setting of the carburetor
• 2,500 ± 200 min
-1
(3) Fine adjustment
• Idling adjustment
(a) Adjust the idling revoluti ons after the engine is fully
warmed up. (Tip on warm-up: Let the engine idle for one
minute in half-throttled status.)
(b) Use the idle adjust screw to set revolutions so that the cut-off wheel does not start rotating while
the engine runs stably.
(c) Set idling revolutions between 2,300 and 2,700 min
-1
by using the idle adjust screw. (Adjust to
approx. 2,500 min
-1
.)
Inspection and repair procedures
Gap between
electrodes
(0.6 to 0.7 mm)
Remove carbon here.
• Idle adjust screw
Idle adjust screw
Revolutions
decrease.
Revolutions
increase.
-8-
1. Disassembly and reassembly of the cleaner
[Tool required]
• Hex. bar wrench (4 mm)
(1) Disassembly
• Loosen the Cleaner Knob [184], remove Cleaner Box
(B) [187], and then take out the Pre Filter [182].
• Loosen the four Set Bolts M5 x 25 [10] by using a hex.
bar wrench (4 mm) and remove Cleaner Box (A) [189].
• Remove the Paper Filter [193] and Nylon Filter [194].
NOTE: Be careful not to let any dust get into the
engine when removing the filter.
• Remove the Rubber Rope [188] and two Bearing
Locks [190] from Cleaner Box (A) [189].
(2) Filter cleaning
• Pat the Pre Filter [182] or apply compressed air to it to
remove dust. If the filter is very contaminated, wash it
with soap and water, and then fully dry it.
• Apply compressed air to the Nylon Filter [194] in order
to remove dust.
• Pat the Paper Filter [193] or apply compressed air
from the bottom of the paper filter to remove dust.
NOTE: Never wash the Paper Filter [193].
(3) Reassembly
Reassembly can be conducted by reversing the disassembly procedure. However, special attention
should be given to the following items.
• Insert the slit portion of the Choke Rod Rubber [192] into Cleaner Box (A) [189].
For details, see “3.
Disassembly and reassembly of the carburetor ass'y.”
• Assemble the Rubber Rope [188] with one end in cont act with the rib of Cleaner Box (A) [189] and the
other end aligned to the tip of the arrow mark.
Disassembly and reassembly
• Cleaner
[10]
[194]
[182]
[193]
[187]
[189]
[184]
[188]
Bottom
Apply air here.
• Rubber rope and bearing lock
[188]
[189]
[
190
]
Rear side
Rib
Arrow mark
Assemble the Rubber Rope
[188] with one end in
contact with the rib and the
other end aligned to the tip
of the arrow mark.
• Paper filter
[189]
-9-
• Cord installation
2. Disassembly and reassembly of the recoil starter and cylinder
[Tools required]
• Hex. bar wrench (4 mm)
• Long-nose pliers
(1) Disassembly
• Pull out and remove the plug cap and Shield Cover [25] from Spark Plug Ass'y BPMR7A [142].
•
Loosen the three Set Bolts M5 x 25 [10] and one Set Bolt M5 [9] by using a hex. bar wrench (4 mm),
and then remove the Recoil Starter [8] and Fan Guide [7].
• Loosen the two Bolts M5 x 16 [45] by using a hex. bar wrench (4 mm), and then remove the Cylinder
Cover [136].
• Remove the Shield Cover Ring [26] from the Shield Cover [25] by using long-nose pliers.
• Use long-nose pliers to open the five caulked portions of the Shield Cover [25] and then remove the
Shield Cover [25] from the plug cap.
NOTE: The Shield Cover [25] and Shield Cover Ring [26] are not mounted on the Models
CM 75EAP and CM 75EBP for North America.
(2) Reassembly
Reassembly can be conducted by reversing the disassembly procedure. However, special attention
should be given to the following items.
• Do not reuse the Shield Cover [25].
• Mount the Shield Cover [25] on the plug cap according to the figure on the next page.
Assemble the high-voltage cord and Cord [21]
as shown in sectional diagram below.
High-voltage cord
Plug cap
[21]
Run the high-voltage cord in the groove of the Cylinder Cover [136].
Put the Cord [21] in pawls of the
Fan Guide
[7]
for reassembly.
[25]
[136]
[7]
[142]
[136]
[21]
High-voltage cord
Do not get any other part caught between the cord
terminal and terminal retaining rib of the Fan Guide [7].
Cord terminal
[23]
[7]
Terminal retaining rib
To the Recoil Starter [8]
[25]
-10-
• Shield cover
• Recoil starter
• Align the line of the Shield Cover [25] to ±0.5 mm from the top of the Cylinder Cover [136] when
inserting the plug cap and Shield Cover [25] into the Spark Plug A ss'y BPMR7A [142].
• Put the Cord [21] in the pawls of the Fan Guide [7] for reassembly.
• Put the high-voltage cord of the Ignition Coil Ass'y [23] in the groove of the Cylinder Cover [136] and
Fan Guide [7] for reassembly.
• Do not get any other part caught between the cord terminal and the terminal retaining rib of the Fan
Guide [7].
• For easier reassembly of the Recoil Starter [8], put the Recoil Starter [8] on its mounting position, pull
the starter handle, and then return it into position.
1. Put the plug cap on the Shield Cover [25]
and fold the Shield Cover [25] into two.
[25]
Bend here.
Plug cap
2. Bend and caulk five tabs of the Shield Cover [25]
by using the long-nose pliers.
3. Mount the Shield Cover Ring [26] by using
long-nose pliers.
[26]
• Shield cover mounting method
Caulk here.
Top of the Cylinder Cover [136]
[25]
Align the line of the Shield Cover [25] to ±0.5 mm
from the top of the Cylinder Cover [136].
[136]
[6]
[7]
[8]
[10]
[45]
[9]
-11-
• Carburetor ass’y
3. Disassembly and reassembly of the carburetor ass'y
[Tools required]
• Hex. bar wrench (4 mm)
• Pliers
(1) Disassembly
• Clamp both ends of the Insulator Clip [147] with pliers. The Insulator Clip [147] opens wider. Remove
the Insulator Clip [147] from the groove of the Carburetor Insulator [149] and move it toward the
Insulator Plate [148].
• Pull out the Carburetor Insulator [149] from the Cylinder [146]. Be careful not to break the insulator.
• Remove the Choke Button [191] and Choke Rod Rubber [192] from Carburetor Ass'y (C3M) [151].
• Lift up the Carburetor Bracket [181] and remove the Throttle Rod [135] from Carburetor Ass'y (C3M)
[151] and the Throttle Lever [134].
• Remove the Fuel Pipes [105] [137] from Carburetor Ass'y (C3M) [151].
• Remove Fuel Pipe (FKM) [150] from the elbow joint.
• Loosen the two Bolts M5 x 55 [195] by using a hex. bar wrench (4 mm), and then remove the
Carburetor Insulator [149], Insulator Plate [148], two Square Nuts (B) M5 [167], Carburetor Ass'y
(C3M) [151], Carburetor Packing [180], and Carburetor Bracket [181].
• Remove the Fuel Pipe [166] from Carburetor Ass'y (C3M) [151] and the Carburetor Bracket [181].
• Remove Fuel Pipe (FKM) [150] from Carburetor Ass'y (C3M) [151].
(2) Reassembly
Reassembly can be conducted by reversing the disassembly procedure. However, special attention
should be given to the following items.
• Subassemble the parts of the Carburetor Insulator [149] as shown in the figure below before mounti ng
the Carburetor Insulator [149] on the Cylinder [146]. Make sure the throttle valve and choke valve of
Carburetor Ass'y (C3M) [151] move smoothly after subassembly.
• Fit the lip portion of the Carburetor Insulator [149] along the groove of the Insulator Plate [148] when
mounting the Carburetor Insulator [149] on the Insulator Plate [148].
• Be careful not to bend the Fuel Pipes [105] [137] [150] [166]. For details, see “4. Connection of the
fuel pipes.”
• For reassembly of the Throttle Rod [135], first insert its tip into the throttle valve of Carburetor Ass'y
(C3M) [151], and then fit the rod to the Throttle Lever [134] while pulling the Throttle Lever [134].
• Apply 0.1 to 0.2 g of Alvania Grease RL3 to the sliding portions of the Choke Button [191] and Choke
Rod Rubber [192] (in the range of 16 to 20 mm from the end of the Choke Button [191]).
• Orient the Choke Button [191] and Choke Rod Rubber [192] correctly. Insert Cleaner Box (A) [189] into
the slit portion of the Choke Rod Rubber [192] when reassembling Cleaner Box (A) [189].
[195]
[149]
[147]
[148]
[151]
[180]
[181]
[146]
Ends
[167]
Subassemble and mount to the cylinder.
[166]
[150]
-12-
• Throttle rod and choke button
• Firmly fit the protrusion of the inner surface of the Carburetor Insulator [149] into the groove of
the Cylinder [146] when mounting the Carburetor Insulator [149] on the Cylinder [146].
• Fit the Insulator Clip [147] into the groove of the Carburetor Insulator [149] when reassembling the
clip.
[135]
[191]
[192]
[134]
[151]
Throttle valve
Choke valve
[192]
Apply 0.1 to 0.2 g of Alvania Grease RL3 to the sliding porti ons
of the Choke Button [191] and Choke Rod Rubber [192].
NOTE: Orient the Choke Button [191] and
Choke Rod Rubber [192] correctly.
Fit Cleaner Box (A) [189] to the slit portion
when mounting Cleaner Box (A) [189].
18±2
-13-
4. Connection of the fuel pipes
The fuel pipes are connected as shown below.
(1) Insert each fuel pipe firmly down to the root of the mating pipe.
(2) Be careful not to bend or twist any fuel pipe.
(3) Be careful not to let any fuel pipe get pinched by other parts.
(4) Position the Clip [138] about 4 to 6 mm away from the end of the pipe near the elbow joint of Fuel Pipe
(FKM) [150].
(5) The projections of Fuel Pipe (Pink) [106] and the Fuel Pipe [137] from the Return Grommet [113] and
Fuel Grommet [112] should be 100 to 10 5 mm and 70 to 75 mm, respectively.
NOTE: Do not mix up the pipes to be inserted into the Priming Pump Comp. [104].
• Fuel pipe connection
[104]
[151]
[106]
[137]
[148]
NOTE: Do not mix up the positions of
the Fuel Pipe [137] and Fuel
Pipe [105].
Thread the Fuel Pipe [105]
throu
g
h the hole as shown below.
[105]
[181]
[166]
[137]
Hole
[105]
[138]
[113]
[112]
[150] (Insert up to the scale line of the elbow joint.)
Elbow joint
[106]
[137]
[113]
[112]
[139]
[138]
7 or more
100
+5
0
70
+5
0
-14-
5. Disassembly and reassembly of the crank case and rear handle
[Tools required]
• Flat-blade screwdriver
• Double-head wrench 10 x 19 mm
• 10 mm socket torque wrench
(1) Disassembly
• Fit the tip of a flat-blade screwdriver into the slot
of the bolt portion of the Spring Holders [60] [140]
to prevent bolt rotation, and then remove the Nut
M6 [47] and Long Nut M6 [116] by using a
double-head wrench 10 x 19 mm or similar tool.
(2) Reassembly
Reassembly can be conducted by reversing the
disassembly procedure. However, special
attention should be given to the following items.
• Mount the Spring Holders [60] [140] so that the
first loop is above that of the Antivibration Springs
[120] [141] [201]. (See the upper-right figure.)
• Apply 0.1 to 0.3 g of Chemiseal L-391 (Chemitech
Inc.) to the bolt portions of the Spring Hol ders [60]
[140] or the female threads of Nut M6 [47] and
Long Nut M6 [116].
• Fit the tip of a flat-blade screwdriver into the slot
of the bolt portion of the Spring Holders [60] [140]
to prevent bolt rotation as shown on the right, and
firmly tighten the Nut M6 [47] and Long Nut M6
[116] without turning the Spring Holders [60]
[140] together by using a double-head wrench 10
x 19 mm or similar tool.
Then tighten the Nut M6 [47] and Long Nut M6 [116] at a specified torque of 5.5±0.5 N•m {56±5
kgf•cm} by using a 10 mm socket torque wrench to check the torque.
• Reassembly of the antivibration coil spring ass'y
[60] [140]
[47] [116]
Up to 1 mm
The Antivibration Springs [120][141][201] must not
exceed this surface of the Spring Holders [60][140].
[120] [141] [201]
• Tightening of the nut M6
[47] [116]
• Rear handle and crank case
[6]
[47]
[47]
[116]
[60]
[201]
[141]
[120]
[60]
[140]
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