RETAINER 2239649 - Caterpillar

Daily Inspection
For the maximum service life of the work tool, make a thorough walk-around inspection before you mount the machine and before you start the engine.Note: Daily inspection of the quick coupler does not require the removal of the work tool.Position the work tool on the ground in front of the machine. Stop the engine on the host machine. Remove the engine start switch key before exiting the machine. Refer to the Operation and Maintenance Manual of the host machine for additional information.Inspect the quick coupler for the following conditions: loose bolts, oil leaks, worn parts and broken parts. Inspect the quick coupler for missing parts. Check the overall condition of the quick coupler. Check the overall condition of the hydraulic system.Ensure that all of the components of the spring (blocking bar) and the hydraulic system are working properly before using the quick coupler.Inspect the blocking bar (1) and the spring (blocking bar) (2) for proper operation. The blocking bar (1) must move freely. Repair any damaged components or inoperable components or replace any damaged components or inoperable components prior to use of the quick coupler.The blocking bar (1) swings into position behind the self-securing hook (4) in order to prevent the self-securing hook (4) from retracting in the event of a hose failure or a hydraulic system failure. The spring (blocking bar) (2) is bolted to the blocking bar (1). The spring (blocking bar) (2) will press against the stick when the quick coupler is in the inverted position. The pressure on the spring (blocking bar) (2) keeps the blocking bar (1) in position.Inspect the spring (blocking bar) (2) for any damage. Ensure that the bolts in the spring (blocking bar) (2) are tight. Repair any damaged components or inoperable components or replace any damaged components or inoperable components prior to use of the quick coupler. Refer to Operation and Maintenance Manual, "Spring (Blocking Bar) - Replace" for additional information.
Illustration 1 g01176014
Hydraulic Pin Grabber Quick Coupler (1) Blocking Bar (2) Blocking Bar Spring (3) Check Valve (4) Self-Securing HookVisually inspect the Hydraulic System for leaks or damage to the hydraulic cylinder, hydraulic lines, and fittings. Repair any damaged components or replace any damaged components prior to use of the quick coupler.
Personal injury or death can result from improperly checking for a leak.Always use a board or cardboard when checking for a leak. Escaping air or fluid under pressure, even a pin-hole size leak, can penetrate body tissue causing serious injury, and possible death.If fluid is injected into your skin, it must be treated immediately by a doctor familiar with this type of injury.
Accumulated grease and oil on a work tool is a fire hazard.Remove debris with steam cleaning or high pressure water at any time a significant quantity of oil is spilled on the work tool.
The Caterpillar Quick Coupler (Hydraulic Pin Grabber) is not designed to be used in applications where there is long exposure to excessive vibration. The vibration caused by extensive use of a hydraulic hammer