Caterpillar cat 436 c backhoe loader (prefix 8tn) service repair manual (8tn00925 01315)

Service Repair Manual
Models
436C BACKHOE LOADER

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Product: BACKHOE LOADER
Model: 436C BACKHOE LOADER 8TN
Configuration: 436C Backhoe Loader Center Pivot, Single Tilt 8TN00925-01315 (MACHINE) POWERED BY 3054 Engine
Disassembly and Assembly
3054 Engine for Caterpillar Built Machines
Media Number -SENR6241-13 Publication Date -01/08/2008 Date Updated -04/08/2008
i02453085
Pistons and Connecting Rods - Install
SMCS - 1225-012
Installation Procedure
Table 1
Required Tools
Tool Part Number Part Description Qty
B 1U-6684 Piston Ring Compressor 1
C 8T-0455 Liner Projection Tool Group 1
NOTICE
Keep all parts clean from contaminants.
Contaminants may cause rapid wear and shortened component life.
1. Thoroughly clean all of the components.
2. Lubricate the piston and the cylinder liner with clean engine oil.
3. Rotate the crankshaft until the connecting rod journal is at the bottom center. Lubricate the
connecting rod journal with clean engine oil.
4. Install the upper connecting rod bearing cap in the connecting rod. Ensure that the locating
tab is correctly installed in the connecting rod.
5. Lubricate the bearing for the upper connecting rod journal with clean engine oil.
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6. Align the piston rings on the piston so that the distance between the gaps is 120 degrees.
Illustration 1 g01224228
7. Install Tooling (B) on the piston.
Note: Ensure that Tooling (B) is installed correctly and that the piston can easily slide out of
the Tooling.
Note: The arrow or "FRONT" Mark that is on the top of the piston must be toward the front
of the engine.
8. Push the piston and the connecting rod assembly into the cylinder liner and onto the
connecting rod journal.
9. Install the lower connecting rod bearing in the connecting rod cap. Ensure that the locating
tab is correctly installed in the connecting rod cap.
10. Lubricate the lower connecting rod bearing with clean engine oil.
11. Install connecting rod caps (2) with the bolts and nuts (1) .

12. Use the following procedure with serrated connecting rods and flat connecting rods:
a. If the connecting rod cap is held in position with bolts and nuts, tighten the nuts to a
torque of 125 N·m (92 lb ft).
b. If the connecting rod cap is held in position with bolts, tighten the bolts to a torque of
155 N·m (114 lb ft).
13. Use the following procedure with hydraulically fractured connecting rods:
Note: Do not reuse the bolts. New bolts should be used.
a. Tighten the bolts to a torque of 70 N·m (52 lb ft).
b. Tighten the bolts for an additional 120 degrees.
14. Rotate the crankshaft in order to ensure that there is no binding.
15. Use Tooling (C) in order to check the height of the piston above the cylinder block. Refer to
Testing and Adjusting, "Piston Height - Inspect".
End By:
a. Install the piston cooling jets. Refer to Disassembly and Assembly, "Piston Cooling Jets -
Remove and Install".
b. Install the engine oil pump. Refer to Disassembly and Assembly, "Engine Oil Pump -
Install".
c. Install the cylinder head. Refer to Disassembly and Assembly, "Cylinder Head - Install".
Copyright 1993 - 2019 Caterpillar Inc.
All Rights Reserved.
Private Network For SIS Licensees.
Fri Nov 1 14:26:35 UTC+0800 2019

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i01463918
Connecting Rod Bearings - Remove
SMCS - 1219-011
Removal Procedure
Start By:
A. Remove the engine oil pan. Refer to Disassembly and Assembly, "Engine Oil Pan - Remove
and Install".
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, "Caterpillar Tools and Shop
Products Guide" for tools and supplies suitable to collect and contain
fluids on Caterpillar products.
Dispose of all fluids according to local regulations and mandates.

Typical example
1. Remove bolt (2) and two bolts (1) that hold the engine oil relief valve in position.
2. Remove the engine oil relief valve in order to gain access to the connecting rods.
3. Remove two bolts (4) that fasten the oil line to the engine oil pump. Remove bolt (3) that
holds the oil strainer in position.
4. Remove the oil strainer and the oil line in order to gain access to the connecting rods.
5. In order to remove the connecting rod caps, turn the crankshaft in a clockwise direction until
the piston is at the bottom center position.

Type A connecting rod.
Type B connecting rod.
Note: There are two types of connecting rods that may be used in the engine. Type A
connecting rods have serrated mating faces on the connecting rod and the connecting rod
cap. Type A connecting rods are held together with a through bolt and a nut. Type B
connecting rods have an alignment pin in the connecting rod cap. Type B connecting rods
are held together with a bolt that is threaded into the connecting rod.
6. If you have Type A connecting rods, remove two nuts (9) and two bolts (10) that fasten the
connecting rod cap to the connecting rod. If you have Type B connecting rods, remove two
bolts (11) that fasten the connecting rod cap to the connecting rod.
7. Remove connecting rod cap (8) from the connecting rod.
8. Remove lower connecting rod bearing (5). Keep the connecting rod bearings together with
the respective connecting rod caps for installation purposes.
9. Carefully push the connecting rod into the cylinder liner in order to remove upper
connecting rod bearing (6). The connecting rod may need to be rotated in order to prevent
contact with the piston cooling jet.
10. Remove upper connecting rod bearing (6). Keep the connecting rod bearings together with
the respective connecting rods for installation purposes.
11. Repeat Steps 5 through 9 for the remaining connecting rod bearings.
Fri Nov 1 14:27:31 UTC+0800 2019

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i01463939
Connecting Rod Bearings - Install
SMCS - 1219-012
NOTICE

Type A connecting rod.
Type B connecting rod.
Note: There are two types of connecting rods that may be used in the engine. Type A
connecting rods have serrated mating faces on the connecting rod and the connecting rod
cap. Type A connecting rods are held together with a through bolt and a nut. Type B
connecting rods have an alignment pin in the connecting rod cap. Type B connecting rods
are held together with a bolt that is threaded into the connecting rod.
1. Clean the bearing surface of connecting rod (7) and connecting rod cap (8) .
2. Clean upper connecting rod bearing (6) and lubricate the bearing face with clean engine oil.
3. Clean lower connecting rod bearing (5) and lubricate the bearing face with clean engine oil.
Note: Align the tabs on the connecting rod bearings with the tab grooves in the connecting
rod.
4. Install upper connecting rod bearing (6) in connecting rod (7) .
5. Pull the connecting rod into position against the crankshaft. The connecting rod may need to
be rotated in order to prevent contact with the piston cooling jet.
6. Install lower connecting rod bearing (5) in connecting rod cap (8) .
7. Put connecting rod cap (8) in position on connecting rod (7). Ensure that the identification
numbers are stamped on the same side.

8. If you have Type A connecting rods, install two bolts (10) and two nuts (9) that fasten the
connecting rod cap to the connecting rod. Tighten the nuts for the connecting rod cap to a
torque of 125 N·m (92 lb ft). If you have Type B connecting rods, install two bolts (11) that
fasten the connecting rod cap to the connecting rod. Tighten the bolts for the connecting rod
cap to a torque of 155 N·m (114 lb ft).
9. Repeat Steps 1 through 8 for the remaining connecting rod bearings.
10. Put the oil line in position on the engine oil pump and install bolts (4). Install bolt (3) that
holds the oil strainer in position.
11. Put the engine oil relief valve in position on the engine and install two bolts (1) and bolt
(2) .
End By: Install the engine oil pan. Refer to Disassembly and Assembly, "Engine Oil Pan -
Fri Nov 1 14:28:27 UTC+0800 2019

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i01758964
Crankshaft Main Bearings - Remove
SMCS - 1203-011
Removal Procedure
Table 1
Required Tools
A 9U-6282 Torque Wrench Extension 1
Start By:
a. Remove the engine oil relief valve and the oil strainer. Refer to Disassembly and Assembly,
"Engine Oil Relief Valve - Remove and Install".
NOTICE
Note: Remove the following components from the engine in order to remove the rear main
bearing with the crankshaft in position: flywheel, flywheel housing, rear oil seal housing and
bridge assembly.
Note: Use Tooling (A) in order to remove the front main bearing cap with the front housing and
the engine oil pump in place. If Tooling (A) is not available, removal of the front cover and the
engine oil pump will be necessary. The engine oil pump is attached to the front main bearing cap.

Removal of the bolts is not possible with a socket. Refer to Disassembly and Assembly, "Engine
Oil Pump - Remove".
1. Remove all necessary components in order to gain access to the specific main bearing cap.
2. Make sure that the main bearing cap is marked for the location and direction for installation.
The main bearings and the main bearing caps must be installed in the same location.
3. Remove two bolts (1) and main bearing cap (2).
4. Remove lower main bearing (3) from main bearing cap (2). Keep the respective main
bearing and the main bearing cap together for proper installation.

5. Push upper main bearing (4) from the opposite side of the bearing tab with a suitable tool.
Carefully rotate the crankshaft while you push on the bearing. Remove upper main bearing
(4) from the cylinder block. Keep the upper bearing halves together in order to ensure
proper installation.
6. Repeat Steps 1 through 5 for the remaining main bearings.
Fri Nov 1 14:29:23 UTC+0800 2019

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i01758965
Crankshaft Main Bearings - Install
SMCS - 1203-012
Table 1
Required Tools
A(1)
9U-6282 Torque Wrench Extension 1
B 8T-5096 Dial Indicator 1
(1)
Tooling (A) must be used in order to install the front main bearing cap with the front housing and the engine oil
pump in place.
NOTICE

1. Clean upper main bearing (4) and lubricate the bearing surface with clean engine oil.
Note: Ensure that the upper halves of the main bearings are installed so that the bearing tabs
fit into the notch in the cylinder block.
NOTICE
Only the upper half of the main bearing has lubrication holes. Make
sure the upper half of the main bearing is installed correctly in the
cylinder block to ensure proper lubrication.
2. Slide upper main bearing (4) into position between the crankshaft journal and the cylinder
block.
3. Clean main bearing cap (2) and lower main bearing (3). Lubricate the bearing surface of
lower main bearing (3) with clean engine oil.
Note: Ensure that the lower halves of the main bearings are installed so that the bearing tabs
fit into the notch in the main bearing caps.

4. Install lower main bearing (3) in main bearing cap (2).
5. Make sure that the bearing tabs on both halves of the main bearings are located on the same
side. Install main bearing caps (2).
6. Lubricate the threads of bolts (1) with clean engine oil.
7. Install bolts (1). Tighten bolts (1) to a torque of 250 N·m (185 lb ft). Use Tooling (A) to
tighten the bolts for the front main bearing cap.
8. Repeat Steps 1 through 7 for the remaining main bearings.
9. Rotate the crankshaft in order to ensure that the crankshaft turns freely.
Typical example
10. Check the crankshaft end play. Use a prybar to move the crankshaft toward the rear of the
engine. Install Tooling (B) and zero the dial indicator. Move the crankshaft with the prybar
toward the front of the engine. Measure the crankshaft end play. The maximum permissible
crankshaft end play is 0.51 mm (0.020 inch).
Note: If the crankshaft was not removed for the rear main bearing removal, the following
components must be installed: bridge assembly, rear oil seal housing, flywheel housing and
flywheel.

End By:
a. Install the engine oil relief valve and the oil strainer. Refer to Disassembly and Assembly,
"Engine Oil Relief Valve - Remove and Install".
Fri Nov 1 14:30:18 UTC+0800 2019

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i01645907
Crankshaft - Remove
SMCS - 1202-011
Removal Procedure
Start By:
A. Remove the fuel injection pump. Refer to Disassembly and Assembly, "Fuel Injection Pump
- Remove".
B. Remove the engine oil pump. Refer to Disassembly and Assembly, "Engine Oil Pump -
Remove".
C. Remove the front housing. Refer to Disassembly and Assembly, "Housing (Front) -
Remove".
D. Remove the flywheel housing. Refer to Disassembly and Assembly, "Flywheel Housing -
E. Remove the housing for the crankshaft rear seal. Refer to Disassembly and Assembly,
"Crankshaft Rear Seal - Remove".
NOTICE

1. Remove two socket head bolts (1) that hold bridge (2) in position.
2. Remove bridge (2) from the cylinder block.
Note: Inspect the main bearing caps and the connecting rod caps for the proper
identification marks. The identification marks should give the location and the direction of
the bearings in the engine.
3. Remove ten main bearing cap bolts (3) from the main bearing caps.
4. Remove five main bearing caps (4) from the cylinder block.
5. Remove the lower main bearings and the lower thrust washers. Keep the lower main
bearings with the respective main bearing caps.

Note: The connecting rod caps can be held on the connecting rod with two bolts and two
nuts. The connecting rod caps can also be held on the connecting rod with two bolts that are
threaded into the connecting rod.
6. Remove eight nuts (5) from the connecting rod caps.
7. Remove four connecting rod caps (6) from the connecting rods.
8. Remove the bearings from connecting rod caps (6). Keep the connecting rod bearings with
the respective connecting rod cap.
NOTICE
Do not allow the connecting rods to strike the piston cooling jets.
Damage or misalignment may occur.
9. Push the piston assemblies into the cylinder bores.

10. Attach lifting straps and a suitable lifting device to crankshaft (7) .
11. Lift crankshaft (7) out of the cylinder block. The weight of the crankshaft is 29 kg (65 lb).
Do not scratch any of the finished surfaces on the crankshaft.
12. Remove upper main bearings (8) and upper thrust washers (9) from the cylinder block.
Fri Nov 1 14:31:14 UTC+0800 2019

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i04990490
Crankshaft - Install
SMCS - 1202-012
NOTICE
1. Ensure that all of the lubrication passages are clean and free of debris.
2. Clean the seat for the main bearing in the cylinder block and clean the upper main bearings.

3. Install upper main bearings (8) with the location tabs in the correct position in the cylinder
block. Lubricate upper main bearings (8) with clean engine oil.
4. Ensure that the main bearing journals of crankshaft (7) are clean. Attach lifting straps and a
suitable lifting device in order to position the crankshaft in the cylinder block.
5. Clean upper thrust washers and lubricate upper thrust washers (9) . Place upper thrust
washers (9) in the cylinder block on both sides of the center main bearing.
NOTICE
Ensure that the slotted sides of the thrust washers are toward the
crankshaft.
6. Clean the lower main bearings. Install the lower main bearings in the main bearing caps
with the location tabs in the correct position. Lubricate the lower main bearing caps with
clean engine oil.
7. Clean the lower thrust washers and lubricate the lower thrust washers. Place the lower thrust
washers in the cylinder block.

8. Ensure that the dowels for main bearing caps (4) are in the correct position in the main
bearing caps or in the cylinder block. Install main bearing caps (4) in the position that is
marked during the removal process. All of the location tabs on the main bearings should be
on the same side. The serial number that is stamped on the main bearing cap should match
the number that is stamped on the bottom face of the cylinder block.
Note: The connecting rod caps can be held on the connecting rod with two bolts and two
nuts. The connecting rod caps can also be held on the connecting rod with two bolts that are
threaded into the connecting rod.
9. Install bolts (3) in the main bearing caps. Tighten the bolts to a torque of 265 N·m (196 lb
ft).
10. Install connecting rod caps (6) and connecting rod cap bolts (5) . Tighten the bolts to a
torque of 155 N·m (115 lb ft).

11. Clean the bridge and the face of the cylinder block. Apply a thin bead of Loctite 596 on the
corners of the seat for the bridge. Also apply the sealant around the thread holes in the seat
for the bridge. Use the following steps when you apply the Loctite 596 to the cylinder block
and the bridge.
a. Apply a 3.0 mm (0.12 inch) bead of Loctite 596 along the corner of the top recess in
the cylinder block.
b. Install bridge (2) and the rubber seals, if equipped. The rubber seals will sit higher
than the bridge when the seals are correctly installed. Use a straight edge to line up
the bridge with the face of the cylinder block. Tighten socket head bolts (1) to a
torque of 16 N·m (12 lb ft). Tighten the bolts evenly.

Caterpillar cat 436 c backhoe loader (prefix 8tn) service repair manual (8tn00925 01315)

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Caterpillar cat 436 c backhoe loader (prefix 8tn) service repair manual (8tn00925 01315)