Onan B48M Manuals

Manuals and User Guides for Onan B48M. We have 1 Onan B48M manual available for free PDF download: Service Manual

Onan B48M Service Manual

Onan B48M Service Manual (32 pages)

Brand: Onan | Category: Engine | Size: 14 MB

Table of Contents

Engine Safety Precautions
2
Table of Contents
3
General Information
4
Engine Model Reference
4
Specifications
5
Tune-Up Specifications
5
Dimensions and Clearances (for BF Engine)
6
Assembly Torques
6
Bolt Torque
6
Dimensions and Clearances (for B43M and B48M Engines)
7
Assembly Torques and Special Tools
7
Dimensions and Clearances (for CCKA Engine)
8
Engine Troubleshooting
9
Oil System
10
Crankcase Oil
10
Oil Filter
10
Crankcase Breather
10
Pressure Lubrication
11
Oil By-Pass Valve
11
Crankcase Breather for BF, B43 and B48
11
Oil Pump Assembly
11
Fuel System (for BF, B43M and B48M)
12
Carburetor Cleaning and Inspection
12
Exploded View of Carburetor
12
Carburetor Disassembly and Repair
13
Fuel Pump Disassembly
13
Replacing Needle and Valve Seat
13
Carburetor Float Adjustment
13
"Nikki" Carburetor Adjustment Procedure (for 1986 Model 226, 446, 448 and 648 Tractors)
14
Carburetors with Spring Assist Choke
14
Carburetors Without Spring Assist Choke
14
Craburetor Adjustments
15
Governor
15
Final Adjustment
15
Main Fuel and Idle Valve Adjustment
15
Air Cleaner
16
Variable Speed Governor Adjustments
16
Air Cleaner Assembly
16
Fuel System (for CCKA)
17
Carburetor
17
Carburetor Idle Adjustment
17
Gasoline Idle Adjustment
17
Cleaning
18
Carburetor Cleaning
18
Low Speed Adjustment
18
High Speed Adjustment
18
Governor Adjustment
19
Engine Disassembly
20
Suggested Disassembly Order
20
Suggested Assembly Procedure
20
Tappet Adjustment
20
Valve System
21
Flywheel
22
Gear Cover
22
Governor Cup
22
Valve Clearance
22
Timing Gears
23
Gear Cover Assembly
23
Governor Cup Detail
23
Pistons and Connecting Rods
24
Inspection
24
Piston Inspection
24
Timing Gear Removal and Installation
24
Connecting Rod Bushing Replacement
25
Connecting Rod Inspection
25
Connecting Rod Bearings Inspection (CCKA)
25
Removing Piston Rings
25
Fitting Pistons
26
Fitting Piston Rings
26
Connecting Rod Alignment
26
Rod Bearing Replacement (Piston in Engine)
26
Cylinder Block
27
Repair
27
Methods of Measuring the Diameter of a Cylinder
27
Crankshaft
28
Crank and Cam Bearings
28
Crosshatching
28
Camshaft Bearing
28
Crankshaft Endplay
29
Checking Bearing Clearance with Plastigauge
29
Bearings for Rear Bearing Plate
29
Front Main Bearing Installation
29
Oil Seals
30
Assembly
30
Measuring Bearing Clearance
30
Gear Cover and Rear Bearing Plate Oil Seals
30
Installation of Piston in Cylinder
31
Cylinder Heads
31
Installing Piston
31
Cylinder Head Torque Sequence
31

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