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GK20 – GK40
Maintenance and Installation Instructions
Edition: 11.07.2006
For possible technical modifications of the product described in this manual ZF Gotha GmbH reserve the
right to change the product documentations, if necessary. Technical modifications are to be considered as
modifications in production, processing and appearance of the product.
Copyright ZF Gotha GmbH 2006
ZF Gotha GmbH • Karl-Liebknecht-Straße 26 • D-99867 Gotha
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Table of Contents
Related Manuals for ZF GK25
Summarization of Contents
DESCRIPTION
Preface
Introduction to the manual and its intended audience, emphasizing skilled servicemen.
INSTALLATION
General Instructions
General guidelines and requirements for performing installation procedures.
Torque limits in Nm for screws to ZF Standard 148
Table of torque specifications for various screw sizes according to ZF Standard 148.
Condition as supplied, Storage, and Transport
Information on the transmission's condition upon delivery, storage, and transport guidelines.
Removal of the corrosion protection
Procedure for removing protective coatings from the transmission before installation.
Attachment of the Electric Motor
Instructions for attaching the electric motor to the transmission unit.
Pivoted Connection-Steering
Details on the pivoted connection and steering system components.
Mounting of the gear ring with pivoted bogie bearing GK 20, GK 25 & GK 30
Step-by-step guide for mounting the gear ring and bogie bearing for specific GK models.
Mounting of the pivoted bogie bearing with holding ring GK 40
Procedure for mounting the bogie bearing with a holding ring for GK 40.
Mounting of the transmission top section GK 40
Instructions for assembling the top section of the GK 40 transmission.
Mounting and Demounting of the Pivoted Connection
Procedures for mounting, demounting, and checking bolts of the pivoted connection.
Lubrication and maintenance of the pivoted connection
Procedures for lubricating and maintaining the pivoted connection, including relubrication intervals.
Pivoted Connection – Roller Chain Steering
Details on the roller chain steering mechanism for the pivoted connection.
Transmission Attachment to the Mounting Construction in the Vehicle
Requirements for attaching the transmission to the vehicle's mounting structure for optimal performance.
Drive wheel mounting
Procedure and precautions for mounting the drive wheel onto the transmission shaft.
Components and Accessories of a GK Transmission
Transmission Identification
Details on how to identify the transmission type using the model identification plate.
INITIAL OPERATION / MAINTENANCE
Oil grade for transmission types GK 20, GK 25, GK 30
Specifications for approved transmission oil grades for GK 20, 25, and 30 models.
Oil grade for transmission type GK 40
Specifications for approved transmission oil grades for the GK 40 model.
Oil capacity
Table showing the required transmission oil capacity for different GK models.
Maintenance intervals Transmission
Recommended intervals for transmission maintenance tasks like visual inspection and oil changes.
Oil Change
Drain the transmission oil at GK 20, GK 25 & GK 30
Procedure for draining transmission oil from GK 20, 25, and 30 models.
Drain the transmission oil at GK 40
Procedure for draining transmission oil from the GK 40 model.
Fill in the transmission oil at GK 20, GK 25 & GK 30
Procedure for filling transmission oil into GK 20, 25, and 30 models.
Fill in the transmission oil at GK 40 (Possibility 1)
Procedure for filling transmission oil into GK 40 (method 1).
Fill in the transmission oil at GK 40 (Possibility 2)
Procedure for filling transmission oil into GK 40 (method 2).
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