Cat 307b service manual

Remove four bolts 3 and separate recoil spring 2 from front idler 4. The weight of the recoil spring is approximately 27 kg 60 lb. The weight of the front idler is approximately 54 kg lb. Remove the front idler and recoil spring assembly. Thoroughly clean the outside of the front idler prior to disassembly. The weight of the front idler is 54 kg lb. 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.

Drain the oil from the idler into a suitable container for disposal. Use a hammer and a punch to remove spring pin 1 from idler bearing 3. Remove idler bearing 3 from the shaft of the front idler. If necessary, use Tool A to remove bearing 3. Repeat step 3 and remove the other idler bearing from the shaft of the front idler. Remove Duo-cone seal kit 4 from each side of the front idler. Remove bushing 7 from each side of the front idler. Thoroughly clean all parts of the front idler prior to assembly.

Check the condition of bushings 7. If the bushings are worn or damaged, use new parts for replacement. Lower the temperature of bushings 7 , and install one in each side of the front idler with a press. Temporarily install an idler bearing 3 on shaft 6. Install the shaft in the front idler. Install the other idler bearing 3 on the shaft. Check the end play of the shaft. The shaft end play must be 0.

Remove two idler bearings 3 and shaft 6 from the front idler. Install a Duo-Cone seal 4 in each side of the front idler with Tool A. Install a Duo-Cone seal 4 in each idler bearing 3 with Tool A. Check the condition of O-ring seals 5 that are used on shaft 6. If the seals are damaged, use new parts for replacement.

Install two O-ring seals 5 on shaft 6. Put clean SAE 30 oil on the seals. Check the condition of spring pins 1 that are used to hold idler bearings 3 to shaft 6. If the spring pins are damaged, use new parts for replacement. Install shaft 6 in either idler bearing 3. Be sure to align the spring pin hole in the shaft with the spring pin hole in the idler bearing. Install a new spring pin 1 in the idler bearing and through the shaft.

Install the spring pin with the slit, as shown. Install the assembled bearing with the shaft into the front idler. Install the other idler bearing 3 on shaft 6. Check the front idler for air leaks. Apply to kPa Monitor the pressure gauge reading for 30 seconds. Just imagine how much you can save by doing simple repairs yourself.

Many people buy this manual just to have it around for when the inevitable happens. Sooner or later, maintenance will need to be performed. Be prepared for it when it happens by simply purchasing this service manual for later use! See below for a list of items that most of our manuals cover. Installation of the bearing and the seal for the support Note: Prior to the installation of the sleeve bearing and the lip seal, make sure that the pin bore in the support assembly is thoroughly clean.

Lower the temperature of the sleeve bearings. Use Tooling A to install the sleeve bearing in the support. Install the sleeve bearing to Measurement X. Measurement X is 9. Use Tooling B to install lip seals 1. Install the seal with the sealing lip toward the top of the support.

Install the lip seal until the lip seal makes contact with the bearing. Installation of the bearing and the seal for the upper frame Note: Prior to the installation of the sleeve bearing and the lip seal, make sure that the pin bore in the upper frame is thoroughly clean.

Note: The bearing will be installed to Measurement X. Use Tooling A to install the sleeve bearing in the upper frame. Install the sleeve bearing to 9. Install the seal with the sealing lip toward the top of the upper frame. Installation Procedure 1.

Make sure that the pin bores in the support are clean and free of dirt prior to the installation of the support. Attach a suitable lifting device to support assembly 10 and install the support assembly. The weight of the support is approximately kg lb. The total clearance of Measurement X between the support and the upper frame must be no greater than 1.

If the total clearance is less than 1. If the total clearance is more than 1. Once Measurement X has been determined, the support is ready for final installation.

Remove bolt 11 and pin Carefully install the hoses through support Apply 5P Molybdenum Grease on pin assemblies 9 and Slide shims 14 between the support assembly and the upper frame and install pin