Caterpillar 311F LRR EXCAVATOR Troubleshooting of Oil in Coolant

caterpillar 311F LRR EXCAVATOR Oil in Coolant Possible Causes

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 • Engine Oil Cooler

 • Cylinder Head Gasket 

• Cylinder Head 

• Cylinder Block

Troubleshooting Test Procedure: 

1. Engine Oil Cooler

A. Drain the coolant from the cooling system. Drain the lubricating oil from the engine oil cooler. Refer to the Operation and Maintenance Manual for more information.

  B. Check the engine oil cooler for leaks. Refer to Systems Operation, Testing and Adjusting, "Cooling System" for the correct procedure. Result and Action: 

A leak was found in the engine oil cooler. Install a new oil cooler. Refer to Disassembly and Assembly, "Engine Oil Cooler - Remove" and Disassembly and Assembly, "Engine Oil Cooler - Install" for the correct procedure. Flush the cooling system. Refer to the Operation and Maintenance Manual for the correct procedure. Refill the cooling system with the appropriate coolant. For recommended coolant and volume,

  2. Cylinder Head Gasket

A. Remove the cylinder head. Refer to Disassembly and Assembly, "Cylinder Head - Remove". 

 

 B. Inspect the cylinder head gasket for damage and any signs of leaks   

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Results and Actions:

Result: The cylinder head gasket shows no signs of damage or leaks. 

Install a new cylinder head gasket, then install the cylinder head. Refer to

 Disassembly and Assembly, "Cylinder Head - Install".   

Result: The cylinder head gasket shows signs of damage or leaks.

Go to Test Step 3.  

 3. Cylinder Head

A. Inspect the cylinder head for cracks.

 

Perform a leak test on the cylinder head. Refer to Systems Operation, Testing and Adjusting, "Cylinder Head - Inspect" for the correct procedure.

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Result and Actions:

 Damage was found in the cylinder head.

Repair or replace the cylinder head.

  Install the cylinder head. Refer to Disassembly and Assembly, "Cylinder Head - Install".

 Result: No damage found in cylinder head.

 

  4. Cylinder Block A. Inspect cylinder block upper surface for signs of wear and leaks. Refer to Systems Operation, Testing, and Adjusting, "Cylinder Block - Inspect" for the proper procedure.

  Result and Action:

: Damage found in cylinder block. Repair or replace cylinder block. Inspect top deck. Refer to Reuse and Reconditioning Guide for the proper inspection procedure. Result: No damage found in cylinder block. Install cylinder head. Refer to Disassembly and Assembly, "Cylinder Head - Install".

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JCB Backhoe Loader Power Shift - Chain Adjustment

This article describes JCB Backhoe Loader Power Side Shift - Chain Adjustment


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The chain tension should be checked at the initial 100 hours
service and every 500 hours.
Check and Adjust
1
Park the machine on firm level ground, engage the
parking brake and set the transmission to neutral.
Lower the loader arms to the ground.
2
Position the carriage centrally and rest the bucket on
the ground, remove the starter key.
3
Check the chain tension which should be 5 to 10mm
(0.19 to 0.39in) deflection A at the mid point. The
tension should be equal for all chains.
4
If adjustment is required, slacken locknuts C and adjust
on nuts B as required, tighten locknuts C on
completion.
5
Repeat steps 3 and 4 for the opposite pair of chains.
Note: When there is no thread left for adjustment fit new
chains.
6
Operate the carriage side to side several times and
recheck the deflection.










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Removal
1
Park the machine on firm level ground, engage the
parking brake and set the transmission to neutral.
Lower the loader arms to the ground.
2
Position the carriage centrally and rest the bucket on
the ground, remove the starter key.
3
Undo and remove nuts B.
4
Remove split pins D and pin E.
5
Withdraw chains from the machine.
Assembly
1
Thread the chains around the pulley and secure to the
carriage with pin E, fit new split pins D.
2
Connect chain adjusters, tension chains as required,
see Check and Adjust.
Power Sideshift - Chain Adjustment
The chain tension should be checked at the initial 100 hours
service and every 500 hours.
Check and Adjust
1
Park the machine on firm level ground, engage the
parking brake and set the transmission to neutral.
Lower the loader arms to the ground.
2
Position the carriage centrally and rest the bucket on
the ground, remove the starter key.
3
Check the chain tension which should be 5 to 10mm
(0.19 to 0.39in) deflection A at the mid point. The
tension should be equal for all chains.
4
If adjustment is required, slacken locknuts C and adjust
on nuts B as required, tighten locknuts C on
completion.
5
Repeat steps 3 and 4 for the opposite pair of chains.
Note: When there is no thread left for adjustment fit 

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JCB Backhoe Loader Power Sideshift - Wear Pad Renewal

This article mainly introduces JCB Backhoe Loader Power Sideshift - Wear Pad Renewal

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Inspection (1000 hours)


When the wear pads are worn to 6 mm (0.23 in) or below  they should be replaced.
It is permissible to rotate the top wear pads 180° to prolong  service life, provided the contact surface is more than 6 mm  (0.23 in) thick. 

Note: If rotating the wear pad the grease nipples will have to  be swopped over.  Dismantling
1
Park the machine on firm level ground, engage the
parking brake and set the transmission to neutral.
Lower the loader arms to the ground. 

2
Set the carriage fully to end of travel A, shown in centre  position for clarity. 

3
Lower the bucket to take the weight off the kingpost. 

4
Switch OFF the engine and remove the starter key,  operate the control levers to vent residual hydraulic  pressure. 

5
Unlock top lock tab B and unscrew nut C. 

6
Remove bolt D through the slot in the rail E. 

7
Hydraulic clamp F and washer G should remain in  position. 

8
Remove plate J and wear pad H.
Assembly






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9
Fit wear pad H, plate J and bolt D. 

10
Fit new lock tab B and fit nut C. 

11
Set the hydraclamp clearance as described in Sideshift  - Hydraclamp Clearance Setting. 

12
Repeat procedure steps 5 to 11 for the bottom clamp.
The only difference on the bottom clamps is the wear
pad is on the opposite side of the rail from the top
clamp so bolt K need not be completely removed.
Note: If the wear pad is trapped between the rail and
carriage, lower the bucket to relieve the load on the wear  pad. 

13
Lift the bucket and set the carriage to the opposite end  of the travel, repeat the procedure for opposite side. 

14
When all clamps have been assembled recheck the
hydraclamp clearance of all clamps
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New glass installed in JCB backhoe loader cabin

This article focuses on the installation of new glass in the cabin of the JCB backhoe loader

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1 

 Make sure the two spacer blocks are in position (see

step 1 of Preparing the New Glass). 

2 

 Install the glass in the frame aperture:

a ALWAYS use the special lifting tools when moving

the glass. Use a lifting strap to hold large panes of

glass in position as shown W.

b Sit the bottom edge of the glass on the spacer

blocks as shown X.

c Make sure that the glass is correctly positioned, then

gently press around the edges of the glass and

ensure full adhesive contact is achieved. Do not

press too hard or too much adhesive will squeeze

out.

Section B

Body & Framework

9803/3280

Section B

21 - 5

Issue 1

Service Procedures

8-10mm

10-15mm

S186440

S189930

A186410

S

T

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3

Make the inside seal smooth:

a Wearing surgical gloves, dip your finger in a soapy

water solution.

b

Use your finger to make the inside seal smooth.

4

All exposed edges must be sealed using Black

Polyurethane Sealant (see Sealing and Retaining

Compounds).

5

Clean the glass after installation:

IMPORTANT: Use extreme caution when wiping the inside

of the new glass - pushing too hard on the inside of the

glass will affect the integrity of the bonded seal.

a Small amounts of sealant can be cleaned from the

glass using the 'Active Wipe 205'.

b Large amounts of excess sealant should be left to

'cure' (see Note 4) and then cut off with a sharp

knife.

Note 4: On completion of the glass replacement procedures,

the sealant 'curing' time is 30 minutes. This means that the

machine can be driven and used after 30 minutes, but it

MUST NOT be used during the curing period of 30 minutes.

c

Clean the glass using a purpose made glass

cleaner.

6

On completion of the glass installation procedures tidy

the work area:

a Remove ALL broken glass from the cab area.

b Remove the protective covers from the cab seat and

control pedestals.

c Renew all 'warning' and 'information' de

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JCB Backhoe Loader Air Conditioning Compressor Drive Belt - Adjusting

This article mainly introduces JCB Backhoe Loader Air Conditioning Compressor Drive Belt - Adjusting

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1 Park the machine on firm level ground. Raise and block the loader arms. Lower the backhoe to the ground and
stop the engine.

2 Remove the starter key.


! WARNING
Make sure the engine cannot be started. Disconnect thebattery before doing this job.


3 Raise the Bonnet

4 Remove both Side Panels

5 Loosen pivot fastening bolt A. Loosen adjustment link fastening bolts B and C.

6 Position the compressor so that there is approximately 10 mm (3/8 in) slack at point X midway along the belt.

7 Tighten bolts A, B and C. Make sure that bolt A is the    last to be tightened. Note: If a new belt is fitted, check    the belt tension after the first 20 hours of op
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