Operation &
Maintenance Manual
(All Models)

Repair Manual

Product Catalog

Amarillo Gear Company LLC

For a quote on any Amarillo Gear product, please contact your Amarillo Gear representative or email us at info@amarillogear.com

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Large Right Angle Pump Drives

In 1934, Amarillo Gear Company began designing and manufacturing right angle gear drives using spiral bevel gears. Our commitment then, as now, is excellence in design, workmanship, and reliability. The worldwide acceptance of our drives testifies to our ability to live up to this commitment. We currently offer the largest selection of right angle pump drives available from a single manufacturer in the world.

Spiral Bevel Gears

Designed and manufactured by Amarillo Gear Company for smooth and quiet operation. All spiral bevel gears are precision machined from nickel alloy steel, case hardened, and lapped in pairs. Optimum tooth contact and maximum performance is ensured by computer aided design and strict adherence to the latest AGMA (American Gear Manufacturers Association) standards.


Maximum reliability is assured through exclusive use of bearings from leading bearing manufacturers and by only selecting bearings that meet or exceed the AGMA minimum recommended design life. The upper thrust bearing is designed to carry all loads imposed by the pump. Three thrust bearing arrangements (Standard, Heavy, and Extra Heavy) are offered on each model to ensure that the proper bearing is available for even the most unusual application.

Housings and Castings

Castings are rigidly designed and constructed to absorb internal and external loads with minimum deflection. Gear case and bearing housings are manufactured to assure precise and permanent alignment of bearings and gears under load. All casting materials are gray iron for effective damping of noise and vibration. All mating castings are sealed using "formed-in-place" gasket material which eliminates "weeping" associated with fiber-type gaskets.


All shafts are made from alloy steel and are amply sized to provide a rugged spindle for the pump and gears. Surfaces for gears, bearings, and input coupling are precision ground.

Dry Well Construction

Amarillo Gear Company was an early pioneer in the use and perfection of this unique sealing arrangement which provides maximum protection against output shaft leakage.


For models 450A to 1000G, a force fed lubrication system uses an oil screw mounted on the bottom of the vertical shaft to supply lubricant to all bearings and gears. On models sized 1000A and larger, cooled and filtered oil is delivered under pressure by a gear driven positive displacement oil pump. An oil manifold, oil lines, and internal passages assure that lubricant is supplied to all components at the correct location and volume. On many models, lubricant is cooled using fresh water which flows through external heat exchanger. External heat exchangers for marine applications are also available.


Efficiency varies with speed, power, and thrust. Normal ranges are 96-98% efficient. Contact factory for actual values for your application.

Limited Warranty

Unless otherwise provided with the particular Goods, Seller warrants to Buyer that the Amarillo Right Angle Fan Drive, Amarillo Parallel Shaft Gear Drive, and the Amarillo Gear Composite Drive Shaft (whether new or renewed) will be free from defects in material and workmanship for a period ending on the earlier to occur twelve months from the date of installation or eighteen months from the date of shipment from Seller’s factory. Seller warrants to Buyer that the Amarillo Right Angle Pump Drive (new) will be free from defects in material and workmanship for a period ending on the earlier to occur of twenty four months from date of installation or thirty months from date of shipment from Seller’s factory. All other products will be free from defects in material and workmanship for a period ending 12 months from ship date. This Limited Warranty shall be void if the Goods are not installed, operated, serviced and maintained in accordance with Seller’s published instructions for the Goods in effect from time to time or if transmitted loads are not within the published limits for the Goods. In addition, this Limited Warranty shall be void if the Goods are is in any way subjected to: (i) improper storage; (ii) accident, damage, abuse or misuse; (iii) abnormal operating conditions or applications; or (iv) repair or modification by Buyer or any third party without the prior written consent of Seller. Any contract created between the Seller and Buyer is subject to the specific condition that Seller is not obligated to provide insurance, defend and/or indemnify any person or entity other than as provided in Section 12 (Amarillo Gear Company LLC Terms and Conditions of Sale) and that there are no flow-downs from the federal government that become part of the contract.

With respect to any defect in material or workmanship covered by this Limited Warranty, if Buyer notifies Seller of such defect in writing within the warranty period, Seller will, at its sole option, (i) with respect to New Goods, either repair or replace any such defective Goods or part thereof, or (ii) with respect to Renewed Goods, repair or re-perform the defective services or part thereof. This shall be Buyer’s exclusive remedy. Any claims not made within the warranty period are deemed waived by Buyer. Before returning any Goods or part hereunder, Buyer must contact Seller for a Return Goods Authorization number and to arrange for transportation. Seller will not pay any transportation costs incurred without its prior written approval.

In no event will Seller be liable, whether in tort, contract or otherwise, for any bodily injury, death, or property damage resulting from or in any way arising out of any Goods or their sale, use, renewal or manufacture. Seller shall not be liable for any costs for removal, shipping or re-installation of the Goods. IN NO EVENT SHALL SELLER BE LIABLE FOR ANY INCIDENTAL, CONSEQUENTIAL, OR PUNITIVE DAMAGES, OR ANY OTHER LOSSES OR EXPENSES.

No change in any provision in this Limited Warranty may be made without the prior written agreement of an authorized officer of Seller.


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