Description
This 160 page, Caterpillar 621B Tractor Parts Manual is a reproduction of the original, out of print manual. This parts manual includes exploded views of all parts on Caterpillar 621B Tractors with serial numbers 45P1 and up.
The Caterpillar 621B Tractor is equipped with a 3406 engine – for engine parts information you will need to use the parts book for 3406 engine, serial no 70v1 and up. The serial number plate on the engine block provides specific engine identity.
Table of Contents
Engine Related Items
Air Cleaner
Air Lines
Dust Ejector
Engine Support
Exhaust Extension
Fuel Lines
Governor Control
Jacket Water Heater
Muffler
Oil Filter
Oil Level Gauge
Oil Lines
Radiator
Radiator Guard
Suction Fan
Torque Converter Oil Cooler
Turbocharger Shield
Water Lines
Starting and Electrical System
Back-up Warning
Battery and Wiring
Emergency Start Receptacle
Power Train – Power Transmission Unit
Differential and Bevel Gear
Differential Lock Control
Drive Shaft
Final Drive and Wheels
Frame and Case
Gear Pump
Governor and Drive
Manifold and Screens
Planetary Transmission
Power Train
Retarder Arrangement
Torque Converter
Transfer Gears
Transmission
Transmission Case and Covers
Transmission Control
Transmission Filter
Transmission Hydraulic Control
Transmission Pump
Transmission Oil Lines
Wheels
Steering and Braking System
Air and Brake Control
Air Tank
Brake Shield
Service Brake
Steering Cylinder
Steering Gear
Steering Lines
Steering Servo-Master Cylinder
Steering Servo-Receiver Mounting and Cylinder
Chassis
Crankcase Guard
Cushion Hitch
Fast Fill Fuel Adapter
Fenders
Front Bumper
Fuel Tank
Hood
Hood Side Door
Operators Compartment
Power Train Guard
Hydraulic System
Accumulator
Control Valve
Gear Pump
Hitch Control
Hydraulic Pump
Hydraulic Tank and Filter
Load Cylinder
Tractor to Scraper Lines
Cab, Gauges and Accessories
Air Horn
Flow Indicator
Gauges
Roll-Over Protective Structure
Suspension Seat
Windshield
Windshield Wiper
Service Equipment and Supplies
Gasket Kits
Hand Tools
Safety Tread
Specifications
Transfers
