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Cat Undercarriage Management Guide Page 13

Management Guide
13
Hardware Requirements
Track Roller and Idler Caps
Inadequate clamping of the track roller
and idler caps can result in broken
retaining bolts and damage to the
frame or bogie bore.
To install roller and idler hardware:
1. Lubricate the bolt threads with
5P3931 Anti-seize Compound.
2. Align the shaft and cap dowel holes
to ensure proper bearing lubrication
and shaft movement.
3. Snug both bolts evenly prior to
torquing.
4. Tighten the bolts to the specified
torque shown in the charts below.
5. To ensure correct mounting, there
must be a minimum gap of .13 mm
(.005") as shown in the illustration.
If there is insufficient clearance,
remove cap and grind or machine
off sufficient material from the cap
to achieve the correct gap.
Sprocket Segment
The principal cause of segment
loosening and subsequent loss and/or
damage to other parts is incorrect
segment hardware installation.
To install segment hardware:
1. Lubricate the bolt threads and the
washer face of the nut with 5P3931
Anti-seize Compound.
2. Tighten all nuts on any one segment
to the specified initial torque shown in
the chart. This draws the mating parts
together tightly.
3. Tighten each nut an additional 1/3
turn. This stretches the bolt properly
for good retention.
Elevated Sprocket - Roller Hardware Torque Requirements
Model Bolt Size Torque
D4H, 943 5/8" 200 ± 20 lb ft (270 ± 25 N·m)
D5N, D5M, D5H, D6N, D6M, 953 M16 200 ± 30 lb ft (270 ± 40 N·m)
D6H, 963 3/4" 360 ± 45 lb ft (475 ± 60 N·m)
D6R, 963 M20 400 ± 50 lb ft (540 ± 70 N·m)
D7R, D7H, D8T, D8R, D8N,
D8L, D9T, D9R, D9N 7/8" 550 ± 65 lb ft (750 ± 90 N·m)
D9L, D10T, D10R, D10N 1" 850 ± 75 lb ft (1125 ± 100 N·m)
D10 1-1/8" 1015 ± 105 lb ft (1350 ± 135
N·m)
Elevated Sprocket - Idler Hardware Initial Torque Requirements
Model Bolt Size Torque
D5H, D4H 5/8" 200 ± 30 lb ft (270 ± 40 N·m)
D5N, D5M, D6N, D6M M16 200 ± 30 lb ft (270 ± 40 N·m)
D6R
M20
430 ± 60 lb ft (570 ± 80 N·m)
D6H 3/4"
360 ± 45 lb ft (475 ± 60 N·m)
D7R, D7H 7/8" 550 ± 65 lb ft (750 ± 90 N·m)
D9L, D8L 1" 850 ± 75 lb ft (1125 ± 100 N·m)
D9T, D9R, D9N, D8T, D8R, D8N 1-1/8" 1185 ± 150 lb ft (1600 ± 200
N·m)
D10T, D10R, D10N, D10 1-1/4" 1700 ± 220 lb ft (2300 ± 300
N·m)
D11R 1-3/8" 2220 ± 260 lb ft (3000 ± 350
Low Sprocket - Sprocket Segment Hardware Initial Torque
Model Bolt Size Initial Torque
D4G, D4C, D3G, D3C, 935 1/2" 50 ± 8 lb ft (70 ± 10 N·m)
953C M16 75 ± 15 lb ft (100 ± 20 N·m)
D6, D5G, D5C, D5, 973, 963,
955, 953B, 943, 939 5/8" 130 ± 30 lb ft (175 ± 40 N·m)
D7, 977, 973 3/4" 220 ± 40 lb ft (300 ± 50 N·m)
D9, D8, 983 7/8" 250 ± 50 lb ft (340 ± 70 N·m)
Elevated Sprocket - Sprocket Segment Hardware Initial Torque
Model Bolt Size Initial Torque
D6R, D6N, D6M, D5N, D5M
D5H, D4H 5/8" 130 ± 30 lb ft (175 ± 40 N·m)
D8T, D8R, D8N, D8L, D7R 3/4" 220 ± 40 lb ft (300 ± 50 N·m)
D9L 7/8" 650 ± 50 lb ft (870 ± 70 N·m)
D9T, D9R, D9N 7/8" 480 ± 50 lb ft (650 ± 70 N·m)
D10T, D10R, D10N, D10 1" 650 ± 50 lb ft (870 ± 70 N·m)
D11R, D11N 1-1/8" 650 ± 50 lb ft (870 ± 70 N·m)
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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