Caterpillar Backhoe Loader 434E

Engine Crankcase Breather - Replace

Loosen the clamp (9) and remove the hose (10) from the connector (12)

Remove the setscrews (8) and remove the connector (12) from the cylinder head. Remove the gasket (13). Remove the O-ring seal (11) from the connector. Discard the gasket (13) and the O-ring seal (11)

Remove the cover (1) from the valve mechanism cover (5)

WARNING: Personal injury can result from parts and/or covers under spring pressure. Spring force will be released when covers are removed. Be prepared to hold spring loaded covers as the bolts are loosened.

Remove the screws (2). Remove the plate (3)

Remove the diaphragm (4) and the cap (6). Remove the spring (7). Discard diaphragm (4)

WARNING: 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.

Install the spring (7), the cap (6), and a new diaphragm (4)

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.

Dispose of all fluids according to local regulations and mandates.

Obtain the sample of the coolant as close as possible to the recommended sampling interval. Supplies for collecting samples can be obtained from your Caterpillar dealer.

Refer to Operation and Maintenance Manual, “Cooling System Coolant Sample (Level 1) - Obtain” for the guidelines for proper sampling of the coolant.

Sample obtained for Level 2 analysis?

Submit the sample for Level 2 analysis.

Reference: For additional information about coolant analysis, refer to Special Publication, SEBU6250, “Caterpillar Machine Fluids Recommendations” or consult your Caterpillar dealer.

Sign off on the coolant sample collection

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. Dispose of all fluids according to local regulations and mandates.

Obtain the sample of the coolant as close as possible to the recommended sampling interval. Supplies for collecting samples can be obtained from your Caterpillar dealer.

Refer to Operation and Maintenance Manual, “Cooling System Coolant Sample (Level 1) - Obtain” for the guidelines for proper sampling of the coolant.

Sample obtained for Level 2 analysis?

Sign off on the coolant sample collection

Is the date of installation label present?

If the date of installation label is missing, replace belt within 3 years from the year of manufacture.

Year of manufacture as indicated on belt webbing label, buckle housing, or installation tags

Consult your Cat dealer for the replacement of the seat belt and the mounting hardware.

Is the new seat belt within the install by date?

Complete seat belt system should be installed with new mounting hardware.

Date of new seat belt installation

Backhoe Boom, Stick, Bucket, and Cylinder Bearings - Lubricate

Brake Reservoir Oil Level - Check

Brake Reservoir Oil Level Check Steps

Service Brake Holding Ability Test Steps

Secondary Brake Holding Ability Test Steps