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Cat Undercarriage Management Guide Page 10

Management Guide
6 & 7
1
3
4
5
8
A
2
B
Track Adjustment Procedures
10
Low Sprocket Tractors and Loaders
1.
Move the machine forward and let
it coast to a stop without applying the
brakes. Then park the machine and
turn off the engine.
Place a tight line over the grouser tips
from the sprocket to the front idler.
Track sag should be about 2 inches
or 50 millimeters. If your track
requires adjustment, complete
the following steps.
2.
Connect the grease gun to the fitting
at the track adjustment mechanism
“A” located under the inspection plate.
“B” is the front idler bearing assembly.
3.
Add grease to extend the hydraulic
track adjuster until the idler is at
maximum forward position. The
relief valve should remain closed.
After adding grease, the track should
be almost straight between the front
carrier roller and idler.
4.
On machines with one carrier roller
per side, place a mark on the track
roller frame .4 inch or 10 millimeters
behind the rear edge of the front idler
bearing assembly “B.”
On machines with more than one
carrier roller per side, mark the track
roller frame .5 inch or 13 millimeters
behind the rear edge of the assembly.
5.
Open the hydraulic relief valve.
6.
Place a track pin or drawbar pin
between the sprocket teeth near the
link assembly.
7.
Travel in reverse until the idler
backs up at least .5 inch or 13
millimeters. Move the machine
forward until the pin is free of
the track, then remove the pin.
8.
Close the hydraulic relief valve.
Using the grease gun, extend the
hydraulic track adjuster until the
rear edge of the idler bearing
assembly aligns with the mark
on the roller frame.
The resulting sag should be about
2 inches or 50 millimeters. Operate
the machine in forward and reverse,
then reinspect track adjustment.
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Contents Summary of Cat Undercarriage Management Guide

  • Page 1Cat Undercarriage ® Management Guide Caterpillar. The difference counts.™ Undercarriage System Management • Operating and Maintenance Tips • Track Adjustment Procedures • Hardware Requirements
  • Page 2Contents Introduction.............................................................................................................................3 Operating and Maintenance Tips ........................................................................................4-7 Custom Track Service Factors
  • Page 3Introduction Work it hard. Make it last. Fix it right. Caterpillar® Undercarriage is designed to work and wear as a system to reduce your operating costs. You make daily decisions that impact undercarriage wear and costs. This guide can help you and your operators understand how undercarriage works
  • Page 4Operating and Maintenance Tips Custom Track Service Factors Affecting Wear Your undercarriage is an expensive While there is no substitute for Application investment. It accounts for as much Custom Track Service, you also play Application describes what your as 20 percent of the price of a new an im
  • Page 5Packing Terrain During operation, materials can Most of the time you can’t control the Working on a side hill shifts the stick to and pack between mating terrain you are working in. However, weight and load balance to the components such as rollers, links, it is important to understand how downhill
  • Page 6Operating and Maintenance Tips Factors Affecting Wear Control the operation of your machine One of the best ways to protect your machine against unnecessary wear is to make sure it is used properly. All of the following cause additional wear on the components of your Always use the narrowest shoe po
  • Page 7Be sure your track is always properly adjusted Operating Checklist Every application affects Improperly adjusted track can result undercarriage wear differently and in problems and wear on other requires proper track adjustment. components such as: Adjust your track in the underfoot ❏ 1. Always use
  • Page 8Track Adjustment Procedures Elevated Sprocket Tractors Incorrectly adjusted track can cost 1. Move the tractor forward and let it 1 you money both in accelerated coast to a stop without applying the undercarriage wear and downtime. brakes. Make sure slack is between If the track is too tight, damagi
  • Page 9Chart 1 Chart 3 Proper Track Sag Track Roller Frame Extension Specifications Machines without carrier rollers Machines with and without carrier rollers Max. Length of Inches Millimeters Exposed Tube Model Min Target Max Min Target Max Model (Serial Number Range) Inches Millimeters D11R, D11N, D10 6.
  • Page 10Track Adjustment Procedures Low Sprocket Tractors and Loaders 1. Move the machine forward and let On machines with more than one 1 it coast to a stop without applying the carrier roller per side, mark the track brakes. Then park the machine and roller frame .5 inch or 13 millimeters turn off the eng
  • Page 11Hydrostatic Loaders 1. Move the machine forward and let 5. Open the relief valve and let the 1 it slowly come to a stop. Then park idler drift back until the second mark the machine and turn off the engine. is behind the recoil housing. Then Place a tight line over the grouser close the relief valve
  • Page 12Track Adjustment Procedures Hydraulic Excavators 1. Operate the machine in the direction 4. If the track is too tight, loosen it by 1 of the idlers. opening the relief valve and allowing 2. Stop with one track pin directly over grease to escape. the front carrier roller. Park the 5. Tighten track by
  • Page 13Hardware Requirements Track Roller and Idler Caps Inadequate clamping of the track roller 3. Snug both bolts evenly prior to and idler caps can result in broken torquing. retaining bolts and damage to the 4. Tighten the bolts to the specified frame or bogie bore. torque shown in the charts below. To
  • Page 14Hardware Requirements Shoe and Link Split Master Link The number one cause of shoe 3. Tighten the bolts to the specified The importance of correctly loosening is improperly tightened shoe initial torque shown in the chart below. assembling and torquing cannot hardware. In general, track hardware 4.
  • Page 15Notes 15
  • Page 16Expect More from the Experts When you buy a Cat undercarriage system, you get the support of our parts and service representatives who have tools to help you manage your undercarriage system. Custom Track Service (CTS) is the best way to control costs and downtime. While there is no substitute for C