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525RX
Husqvarna 525RX Workshop Manual
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W
orkshop Manual
English
524L
525L
LS
LS
T
LK
RJX
RJD
RS
RX
RXT
RK
2
Table of Contents
Contents
3
Table of Contents
4
Index
4
Index
5
Introduction and Safety Instructions
6
Target Group
7
Modifications
7
Structure
7
Introduction and Safety Instructions
7
General Instructions
8
Special Instructions
8
Symbols in the Workshop Manual
9
Symbols on the Machine
9
Technical Data
10
Engine Special Tools
12
Special Tools
13
Service Data
15
Safety Equipment
18
Dismantling the Muffler
19
Assembling the Muffler
19
Dismantling the Stop Switch
19
Assembling the Stop Switch
19
Muffler, Dismantling
19
Muffler, Assbling
19
Stop Switch, Dismantling
19
Stop Switch, Assembling
19
Stop Switch, Resistance Test
20
Throttle, Dismantling
20
Assembling the Throttle
22
Throttle, Assembling
22
Repair Instructions
24
Dismantling the Recoil Pulley
25
Assembing the Recoil Pulley
25
Starter Recoil Pulley, Dismantling
25
Starter Recoil Pulley, Assembling
25
Repair Instructions
25
Replacing the Starter Pawls
27
Start Pawls, Replacing
27
Checking the Ignition Spark
28
Ignition Spark, Checking
28
Dismantling the Shaft and Clutch Housing from Engine Body
30
Assembling the Shaft and Clutch Housing to the Engine Body
30
Adjust the Air Gap When Installing the Ignition Module
31
Ignition Module, Adjusting
31
Fuel System
32
Tank Venting
32
Carburettor
33
Replacing the Fuel Filter
33
Air Purge
33
Fuel Pump
33
The Carburettor’s Design
34
The Metering Unit
34
The Blending Unit
34
The Pump Unit
34
Dismantling the Carburettor
35
Carburetor, Dismantling
35
Special Tools
37
Assembling the Carburettor
38
Carburetor, Assembling
38
Carburetor, Settings
40
Fuel Pump
40
Basic Setting
41
Fine Adjustment
41
L-Needle
41
H-Needle
41
Dismantling the Centrifugal Clutch, Flywheel and Ignition Module
42
Centrifugal Clutch, Dismantling
42
Flywheel, Dismantling
42
Ignition Module, Dismantling
42
Assembling the Flywheel, Ignition Module and Centrifugal Clutch
44
Centrifugal Clutch, Assembling
44
Flywheel, Assembling
44
Ignition Module, Assembling
44
Cylinder and Piston, Dismantling
45
Dismantling the Cylinder and Piston
45
Piston, Dismantling
45
Analysis and Actions
47
Cleaning, Inspection
47
Insufficient Lubrication
48
Piston Damage Caused by a too High Engine Speed
49
Piston Ring Breakage
49
Piston Scoring Caused by Heavy Carbon Deposits
49
Bearing Failure
50
Damage Caused by Gudgeon Pin Circlips
50
Piston Ring Guide Pin Vibrated Loose
50
Foreign Objects
51
Inlet Side
51
Service Tips
52
Cylinder Bore
53
Piston Ring Gap
53
Piston Ring Groove
53
Wear Tolerances
53
Assembling the Piston and Cylinder
54
Clean the Crankcase
54
Cylinder and Piston, Assembling
54
Piston, Assembling
54
Inspecting the Crankshaft
55
Crankshaft, Dismantling
55
Crankcase, Dismantling
55
Dismantling, Crankshaft and Crankcase
55
Assembling the Crankshaft and Crankcase
57
Crankshaft, Assembling
57
Crankcase, Assembling
57
Replacing the Clutch Drum and Drive Shaft
58
Dismantling and Assembling the Clutch Drum and Drive Shaft
58
Clutch Drum, Dismantling and Assmebling
58
Dismantling the Bevel Gear
61
Bevel Gear, Dismantling
61
Assembling the Bevel Gear
63
Bevel Gear, Assembling
63
Troubleshooting
64
Engine Does Not Start
65
Engine Stops Working During Operation
66
Engine Is Difficult to Stop
66
Insufficient Output or Unstable Rotation
67
Other Engine Problems
68
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Husqvarna 525RX Specifications
General
Engine displacement
25.4 cm³
Power output
1 kW
Weight
4.9 kg
Sound pressure level at operator's ear
94 dB(A)
Engine type
2-stroke
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