Caterpillar cat 248 b skid steer loader (prefix scl) service repair manual (scl00001 and up)

Service Repair Manual
Models
248B SKID STEER LOADER

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Product: SKID STEER LOADER
Model: 248B SKID STEER LOADER SCL
Configuration: 248B 268B SKID STEER LOADER SCL00001-UP (MACHINE) POWERED BY 3044C Engine
Disassembly and Assembly
3044C Industrial Engine and Engines for Caterpillar Built Machines
Media Number -RENR7582-07 Publication Date -01/01/2010 Date Updated -26/02/2010
i02000605
Inlet and Exhaust Valve Springs - Remove and Install
SMCS - 1108-010
Removal Procedure
Table 1
Required Tools
Tool Part Number Part Description Qty
A 9U-6145 Air Connector (1)
1
B
- Rod (M12 X 1.75 by 380 mm) 1
9U-6144 Adapter As 1
6V-8149 Nut 1
5P-8245 Hard Washer 13
C
4C-8134 Seal Remover 1
1U-7600 Slide Hammer Puller Gp 1
D 8S-2263 Spring Tester 1
( 1 )
The 9U-6145 Air Connector is part of the 9U-6274 Compression Test Tool Gp. The 9U-6145 Air Connector can
be ordered separately.
Start By:
A. Remove the rocker shaft assembly. Refer to Disassembly and Assembly, "Rocker Shaft and
Pushrod - Remove".
B. Remove the fuel injection nozzles. Refer to Disassembly and Assembly, "Fuel Injection
Nozzles - Remove".
1/6248B 268B SKID STEER LOADER SCL00001-UP (MACHINE) POWERED BY 30...
2019/11/20https://127.0.0.1/sisweb/sisweb/techdoc/techdoc_print_page.jsp?returnurl=/sis...

NOTICE
Keep all parts clean from contaminants.
Contaminants may cause rapid wear and shortened component life.
Illustration 1 g01035126
1. Install Tooling (A). Install the bolt and bracket (2). Remove bolt (1) .
Note: Maintain air pressure in the cylinder that is being serviced until both of the valve
springs are removed and installed.

Personal injury can result from being struck by parts propelled by a
released spring force.
Make sure to wear all necessary protective equipment.
Follow the recommended procedure and use all recommended tooling to
release the spring force.
NOTICE
Ensure that the valve spring is compressed squarely or damage to the
valve stem may occur.
2. Install Tooling (B). Use Tooling (B) to compress valve spring (3). Remove cap (4) and
retainers (5) .
3. Release the pressure from Tooling (B) and remove Tooling (B). Remove retainer (6) .
4. If necessary, use Tooling (C) to remove seal (7) .
5. Use Tooling (D) to check the valve spring force. Refer to Specifications, "Cylinder Head
Valves".
6. Repeat Steps 1 through 5 for the removal of the remaining valve springs.

NOTICE
Do not turn the crankshaft while the valve springs are removed.
Installation Procedure
Table 2
Required Tools
A 9U-6145 Air Connector (1)
1
B
- Rod (M12 X 1.75 by 380 mm) 1
9U-6144 Adapter As 1
6V-8149 Nut 1
5P-8245 Hard Washer 13
C 4C-6373 Seal Installer 1
( 1 )
The 9U-6145 Air Connector is part of the 9U-6274 Compression Test Tool Gp. The 9U-6145 Air Connector can
be ordered separately.
NOTICE
1. Keep Tooling (B) and an air hose attached in order to force air pressure into the cylinder.
This will hold the valves in position while the inlet and exhaust valve springs are installed.
Note: Maintain air pressure in the cylinder that is being serviced until both of the valve
springs are installed.

The valve spring keepers can be thrown from the valve when the valve
spring compressor is released. Ensure that the valve spring keepers are
properly installed on the valve stem. To help prevent personal injury,
keep away from the front of the valve spring keepers and valve springs
during the installation of the valves.
2. If necessary, use Tooling (C) to install seal (7) .
3. Position valve spring (3). Position retainer (6) on spring (3) .

NOTICE
4. Install Tooling (B) and compress spring (3). Install retainers (5) and cap (4) .
5. Release the pressure and remove Tooling (B) .
6. Tap the top of the valve with a soft hammer in order to ensure that retainers (5) are properly
installed.
7. Repeat Steps 1 through 6 in order to install the remaining valve springs.
8. Remove the bolt and bracket (2). Remove Tooling (A) and install bolt (1). Tighten bolt (1)
to a torque of 113 to 123 N·m (85 to 90 lb ft).
End By:
a. Install the fuel injection nozzles. Refer to Disassembly and Assembly, "Fuel Injection
Nozzles - Install".
b. Install the rocker shaft assembly. Refer to Disassembly and Assembly, "Rocker Shaft and
Pushrod - Install".
Copyright 1993 - 2019 Caterpillar Inc.
All Rights Reserved.
Private Network For SIS Licensees.
Wed Nov 20 18:18:06 UTC+0800 2019

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i02000146
Inlet and Exhaust Valves - Remove and Install
SMCS - 1105-010
Removal Procedure
Table 1
Required Tools
A 1P-3527 Valve Spring Compressor 1
B 1U-7262 Telescoping Magnet 1
C
4C-8134 Seal Remover 1
1U-7600 Slide Hammer Puller Gp 1
D 8S-2263 Spring Tester 1
Start By:
A. Remove the cylinder head assembly. Refer to Disassembly and Assembly, "Cylinder Head -
Remove".
NOTICE

1. Clean the bottom face of the cylinder head. Check the depth of the valves below the face of
the cylinder head before the valve springs are removed. Refer to Testing and Adjusting,
"Valve Depth - Inspect".
2. Place an index mark on the heads of the inlet valves and the exhaust valves for installation
purposes.
3. Remove caps (1) .

Personal injury can result from being struck by parts propelled by a
released spring force.
Make sure to wear all necessary protective equipment.
Follow the recommended procedure and use all recommended tooling to
release the spring force.
NOTICE
4. Use Tooling (A) to compress spring (2) .
5. Use Tooling (B) to remove retainers (3) .
6. Release the pressure from Tooling (A) and remove Tooling (A) .
7. Remove retainer (4) and valve spring (2). Remove valve (6). Use Tooling (C) to remove
seal (5) .
8. Repeat Steps 4 through 7 in order to remove the remaining inlet and exhaust valves.

9. Use Tooling (D) to check the valve spring force. Refer to Specifications, "Cylinder Head
Valves".
Table 2
Required Tools
A 1P-3527 Valve Spring Compressor 1
E 4C-6373 Seal Installer 1
F 4C-6366 Valve Guide Driver 1
NOTICE

The valve spring keepers can be thrown from the valve when the valve
spring compressor is released. Ensure that the valve spring keepers are
properly installed on the valve stem. To help prevent personal injury,
keep away from the front of the valve spring keepers and valve springs
during the installation of the valves.
1. Use Tooling (E) and Tooling (F) to install seal (5). Lubricate the stem of valve (6) with
clean engine oil. Install valve (6). Install valve spring (2) and retainer (4) .
2. Use Tooling (A) to compress spring (2). Install retainers (3). Release pressure on Tooling
(A) and remove Tooling (A) .
3. Tap the top of the valves with a soft hammer in order to ensure that retainer (3) is properly
installed.
4. Repeat Steps 1 through 3 in order to install the remaining inlet and exhaust valves in the
cylinder head.

5. Install caps (1) .
6. Check the depth of the valves below the face of the cylinder head. Refer to Testing and
Adjusting, "Valve Depth - Inspect" for the correct procedure. If the depth of the new valves
is below the correct depth, the valve seat inserts must be replaced. Refer to Disassembly and
Assembly, "Inlet and Exhaust Valve Seat Inserts - Remove and Install".
End By: Install the cylinder head assembly. Refer to Disassembly and Assembly, "Cylinder Head
- Install".
Wed Nov 20 18:19:02 UTC+0800 2019

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i01998590
Inlet and Exhaust Valve Guides - Remove and Install
SMCS - 1104-010
Removal Procedure
Table 1
Required Tools
A 4C-6366 Valve Guide Driver 1
Start By:
A. Remove the inlet and exhaust valves. Refer to Disassembly and Assembly, "Inlet and
Exhaust Valves - Remove and Install".
NOTICE

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1. Use Tooling (A) to remove the valve guides from the cylinder head.
2. Repeat the procedure for the remaining valve guides.
Note: When new valve guides are installed, new valves and new valve seat inserts must be
installed.
3. Remove the valve seat inserts. Refer to Disassembly and Assembly, "Inlet and Exhaust
Valve Seat Inserts - Remove and Install".
Table 2
Required Tools
A 4C-6366 Valve Guide Driver 1
B 4C-6370 Valve Guide Collar 1
C 157-3720 Valve Seat Cutter 1
NOTICE

1. Position the valve guide in the cylinder head. Carefully tap the valve guide in order to start
the installation. Use Tooling (A) and (B) to seat the valve guide in the cylinder head.
Note: The counterbore in Tooling (B) installs the valve guide to the correct Height (X) .
2. Check the protrusion of the valve guides. Refer to Specifications, "Cylinder Head Valves"
for the protrusion of the valve guide above the valve spring recess.
3. Repeat the procedure to install the remaining valve guides.
4. Install the valve seat inserts. Refer to Disassembly and Assembly, "Inlet and Exhaust Valve
Seat Inserts - Remove and Install".

Note: After installing the valve guides and valve seat inserts, the valve guides must be
reamed and the valve seat inserts must be cut to the finished diameter. The valve guides and
valve seat inserts are cut and reamed in one operation. This procedure ensures the
concentricity of the valve seat to the valve guide in order to create a good seal. Refer to
Specifications, "Cylinder Head Valves" for the finished diameter of the valve guides and
valve seat inserts.
5. Position Tooling (C) into the valve guide. Carefully turn the handle in a clockwise direction
and gradually move the reamer into the valve guide until the valve guide is reamed to the
finished size.
6. Continue to turn the handle in a clockwise direction in order to cut the valve seat insert.
Remove the minimum amount of material in order to ensure a good valve seat. Keep the
valve seat as narrow as possible.
7. Remove Tooling (C). Clean the debris from the valve guide and the valve seat.
End By: Install the inlet and exhaust valves. Refer to Disassembly and Assembly, "Inlet and
Wed Nov 20 18:19:57 UTC+0800 2019

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i01999639
Inlet and Exhaust Valve Seat Inserts - Remove and Install
SMCS - 1103-010
Removal Procedure
Table 1
Required Tools
A 166-7441 Valve Seat Extractor Tool 1
Start By:
A. Remove the inlet and exhaust valves. Refer to Disassembly and Assembly, "Inlet and
NOTICE

Caterpillar cat 248 b skid steer loader (prefix scl) service repair manual (scl00001 and up)

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