Caterpillar cat 973 c track loader (prefix ldx) service repair manual (ldx00001 and up)

Service Repair Manual
Models
973C TRACK LOADER

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Product: TRACK LOADER
Model: 973C TRACK LOADER LDX
Configuration: 973C TRACK-TYPE LOADER LDX00001-UP (MACHINE) POWERED BY C9 Engine
Disassembly and Assembly
Air Conditioning and Heating R134a for All Caterpillar Machines
Media Number -SENR5664-31 Publication Date -01/05/2015 Date Updated -23/10/2018
i05907617
General Information
SMCS - 1808; 7309
Refrigeration System
Personal injury can result from contact with refrigerant.
This system is under pressure at all times, even if the engine is not
running. Heat should never be applied to a charged system.
Contact with refrigerant can cause frost bite. Keep face and hands away
to help prevent injury.
Protective goggles must always be worn when refrigerant lines are
opened, even if the gauges indicate the system is empty of refrigerant.
Always use caution when a fitting is removed. Slowly loosen the fitting.
If the system is still under pressure, evacuate the system recovering the
refrigerant before removing the fitting.
Personal injury or death can result from inhaling refrigerant through a
lit cigarette.
Inhaling air conditioner refrigerant gas through a lit cigarette or other
smoking method or inhaling fumes released from a flame contacting air
conditioner refrigerant gas, can cause bodily harm or death.
Do not smoke when servicing air conditioners or wherever refrigerant
gas may be present.
Before any checks of the air conditioning and heating system are made,
move the machine to a smooth horizontal surface. Lower all implements
1/3973C TRACK-TYPE LOADER LDX00001-UP (MACHINE) POWERED BY C9 En...
2019/8/28https://127.0.0.1/sisweb/sisweb/techdoc/techdoc_print_page.jsp?returnurl=/sis...

to the ground. Make sure the transmission is in neutral or park and that
the parking brake is engaged. Keep all other personnel away from the
machine or where they can be seen.
Personal injury can result from hot coolant. Any contact with hot
coolant or with steam can cause severe burns. Allow cooling system
components to cool before the cooling system is drained.
• All refrigerant lines that are metal or flexible hose must be free of sharp bends. Also, do not
use a refrigerant line that is kinked. Sharp bends will cause a restriction in the refrigerant
flow. Restrictions in the refrigerant lines are identified by cold spots or frost on the line at
the location of the restriction. Restrictions in the lines reduce the performance and the
efficiency of the system.
• The radius of bends in the flexible hose must never be less than ten times the outside
diameter of the hose.
• Do not allow the flexible hoses to come within 63.5 mm (2.50 inch) of the exhaust
manifold.
• The hoses need to be inspected yearly for leaks and for hardness. Conduct a leak test on all
the hoses and the lines. Refer to the Testing and Adjusting, "Refrigerant Leakage - Test"
section. Replace hoses if leaks or hardness are in the hoses. Replace hoses with new hose
that is sealed and free of contaminants.
• The correct use of wrenches is important when connections are made. The type of wrench
that is used is also important. Only use wrenches that are made for use with tube-type
fittings. When a hose is connected or disconnected from the system, use a wrench on the
fitting and use a wrench on the nut. When a metal line is connected or disconnected from
the system, use a wrench on the fitting and use a wrench on the nut.
• Install protective plugs or protective caps on all components and hoses that are disconnected
or removed.
• O-ring seals and O-ring seats must be in good condition. Small cuts, scratches, or particles
of dirt will cause a leak in the system. Put new mineral oil (397-7507) on all new O-ring
seals at the time of installation. Do not use any sealant on connections.
• Dust caps on the compressor block fittings are the primary seals on the air conditioning
system.
• All machines should have an identification tag that specifies the refrigerant charge for the
machine. The tag should be located in the operator compartment.

• If water is in the vents, check the non-return valve. If water leaks from the air conditioning
system, check the non-return valve. The non-return valve should have the proper position
and the proper direction.
• If engine coolant is leaking into the operator compartment, check for loose clamps on the
heater hoses.
Copyright 1993 - 2019 Caterpillar Inc.
All Rights Reserved.
Private Network For SIS Licensees.
Wed Aug 28 19:09:06 UTC+0800 2019

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C9 Engines for Caterpillar Built Machines
Media Number -RENR9579-20 Publication Date -01/02/2015 Date Updated -15/08/2018
i02297056
Turbocharger - Remove
SMCS - 1052-011
Removal Procedure
NOTICE
Keep all parts clean from contaminants.
Contaminants may cause rapid wear and shortened component life.
NOTICE
Care must be taken to ensure that fluids are contained during
performance of inspection, maintenance, testing, adjusting, and repair
of the product. Be prepared to collect the fluid with suitable containers
before opening any compartment or disassembling any component
containing fluids.
Refer to Special Publication, NENG2500, "Dealer Service Tool
Catalog" for tools and supplies suitable to collect and contain fluids on
Cat®
products.
Dispose of all fluids according to local regulations and mandates.

Illustration 1 g01150421
1. Disconnect hose assembly (1).
2. Remove bolts (4) and tube assembly (5).
3. Attach a suitable lifting device onto turbocharger (2). The weight of turbocharger (2) is
approximately 27 kg (60 lb). Remove nuts (3). Remove turbocharger (2) and the gasket.
Wed Aug 28 19:24:04 UTC+0800 2019

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i04000968
Turbocharger - Install
SMCS - 1052-012
Installation Procedure
Table 1
Required Tools
Tool Part Number Part Description Qty
A 5P-3931 Anti-Seize Compound -
NOTICE
1. Apply Tooling (A) to the turbocharger mounting studs on the exhaust manifold.

2. Attach a suitable lifting device to turbocharger (2). The weight of turbocharger (2) is
approximately 27 kg (60 lb). Position the gasket and turbocharger (2) on the exhaust
manifold.
Note: Discard the nuts after use. Use new nuts for installation.
3. Install nuts (3). Tighten nuts (3) to a torque of 54 ± 5 N·m (40 ± 4 lb ft).
4. Position tube assembly (5) and install bolts (4).
5. Connect hose assembly (1).
Wed Aug 28 19:24:54 UTC+0800 2019

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i04000972
Exhaust Manifold - Remove and Install
SMCS - 1059-010
Removal Procedure
Start By:
a. Remove the turbocharger. Refer to Disassembly and Assembly, "Turbocharger - Remove".
NOTICE

Typical Example
1. Remove nuts (2), the washers, and the spacers from studs (1).
2. Remove the exhaust manifold assembly and the gaskets from the cylinder head assembly.
3. Disassemble the exhaust manifold assembly into three pieces (3), (4), and (5).
NOTICE

Typical Example
1. Check the condition of studs (1). Replace studs (1), if necessary.

Typical Example
Note: Discard the nuts after use. Use new nuts for installation.
2. Install the new gaskets with the tabs upward. Assemble three pieces (3), (4), and (5) into the
exhaust manifold assembly. Position the gaskets and the exhaust manifold assembly on the
cylinder head assembly. Install the spacers, the washers, and nuts (2).
3. Tighten nuts (2) to a torque of 55 ± 10 N·m (41 ± 7 lb ft).
End By:
a. Install the turbocharger. Refer to Disassembly and Assembly, "Turbocharger - Install".
Wed Aug 28 19:25:44 UTC+0800 2019

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i02312489
Air Inlet Heater - Remove
SMCS - 1090-011
Removal Procedure
NOTICE

1. Disconnect cable assembly (1).
2. Disconnect harness assembly (2).
3. Remove bolt (4) and disconnect ground strap (3).
4. Remove remaining bolts (4) and remove air inlet elbow (5).

5. Remove air inlet heater (6).
Wed Aug 28 19:26:34 UTC+0800 2019

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i02319594
Air Inlet Heater - Install
SMCS - 1090-012
Table 1
Required Tools
A 4C-9500 Quick Cure Primer 1
B 8C-8422 Sealant 1
NOTICE
NOTICE
Care must be taken to ensure that fluids are contained during
performance of inspection, maintenance, testing, adjusting, and repair
of the product. Be prepared to collect the fluid with suitable containers
before opening any compartment or disassembling any component
containing fluids.

Refer to Special Publication, NENG2500, "Dealer Service Tool
Catalog" for tools and supplies suitable to collect and contain fluids on
Cat®
products.
Dispose of all fluids according to local regulations and mandates.
1. Clean the face of air inlet heater (6) with cleaning solvent. Apply Tooling (A) to the face of
air inlet heater (6). Allow Tooling (A) to dry for 3 to 5 minutes. Apply Tooling (B) to the
joint face and spread uniformly. Air inlet heater (6) must be installed and tightened within
10 minutes.

2. Position air inlet elbow (5). Install bolts (4).
3. Connect ground strap (3) and install bolt (4).
4. Connect harness assembly (2).
5. Connect cable assembly (1).
Wed Aug 28 19:27:23 UTC+0800 2019

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i02550198
Inlet and Exhaust Valves - Remove and Install
SMCS - 1105-010
Removal Procedure
Table 1
Required Tools
A 5S-1330 Valve Spring Compressor 1
Start By:
a. Remove the cylinder head. Refer to Disassembly and Assembly, "Cylinder Head -
Remove".
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.
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.
1. Use Tooling (A) to compress valve springs (3). Remove retainer locks (1).
2. Remove Tooling (A). Remove spring retainer (2) and valve springs (3).

3. Remove valve stem seal (4), spring seat washer (5), and valves (6).
Table 2
Required Tools
A 5S-1330 Valve Spring Compressor 1
NOTICE

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Improper assembly of parts that are spring loaded can cause bodily
injury.
To prevent possible injury, follow the established assembly procedure
and wear protective equipment.
1. Lubricate valves (6) with clean engine oil. Install valves (6) in the cylinder head assembly.
Install new valve stem seal (4) against the valve guide.
2. Install spring seat washer (5), valve springs (3), and spring retainer (2).
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.
Note: A small amount of grease can be used to hold the valve keepers in position during
installation.
3. Use Tooling (A) to compress valve springs (3). Install retainer locks (1).
End By:
a. Install the cylinder head. Refer to Disassembly and Assembly, "Cylinder Head - Install".
Wed Aug 28 19:28:14 UTC+0800 2019

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i05165105
Inlet and Exhaust Valve Guides - Remove and Install
SMCS - 1104-010
Removal Procedure
Table 1
Required Tools
A
9U-6895
or
4C-6366 (1)
Valve Guide Driver 1
( 1 )
If necessary, use Tooling on inlet valve guides.
Start By:
A. Remove the inlet and exhaust valves. Refer to Disassembly and Assembly, "Inlet and
Exhaust Valves - Remove and Install".
NOTICE

1. Use Tooling (A) to remove the inlet valve guides and exhaust valve guides from the
cylinder head assembly.
Table 2
Required Tools
A
9U-6895
or
4C-6366 (1)
Valve Guide Driver 1
B 173-5524 Guide Collar 1
C 342-6109 Guide Collar 1
( 1 )
If necessary, use Tooling on inlet valve guides.
NOTICE

1. Position the inlet valve guide and exhaust valve guide in the cylinder head. Tap on the top
of the valve guides in order to start the inlet valve guides and exhaust valve guides into the
cylinder head assembly.
2. Use Tooling (A) and Tooling (B) to install the Exhaust valve guide. Use Tooling (A) and
Tooling (C) to install the Intake valve guide. Install the valve guides until the protrusion is
Distance (X) . Distance (X) is 12.0 ± 0.5 mm (0.47 ± 0.02 inch) above the cylinder head
assembly.
End By: Install the inlet and exhaust valves. Refer to Disassembly and Assembly, "Inlet and
Exhaust Valves - Remove and Install".
Wed Aug 28 19:29:03 UTC+0800 2019

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i04420274
Inlet and Exhaust Valve Seat Inserts - Remove and Install
SMCS - 1103-010
Removal Procedure
Table 1
Required Tools
A 9S-3095 Puller Handle 1
B
6V-4194 (1)
Valve Seat Extractor 1
1U-9167 (2)
Valve Seat Extractor 1
( 1 )
For use with Exhaust Valve Seat
( 2 )
For use with Intake Valve Seat
Start By:
A. Remove inlet and exhaust valves. Refer to Disassembly and Assembly, "Inlet and Exhaust
Valves - Remove and Install".

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