Product Manual
These motors are built for use in either clockwise or coun-
terclockwise rotation, as viewed from the shaft end.
NOTE: A CASE DRAIN LINE MUST BE INSTALLED
CONNECTING THE CASE DRAIN PORT DIRECTLY TO
THE RESERVOIR WITH NO RESTRICTIONS. DO NOT
RUN THE CASE DRAIN LINE THROUGH A FILTER AS IT
MAY BUILD UP BACK PRESSURE.
If used in a reciprocating application, an external relief
valve is recommended.
Description
These hydraulic gear motors are of a positive displace-
ment three-piece modular design. The motors are con-
structed with permanent mold grey iron (or aluminum)
front and rear covers and an extruded aluminum center
section which houses the external spur gear set and
the pressure loaded bushing blocks. The hardened and
ground one-piece gear and shaft rotate in Teflon coated
steel backed bronze bushings. The bearings are installed
in the precision machined bushing blocks for optimum
shaft alignment. High efficiency is obtained with mini-
mum radial tip clearance created by a specialized run-in
procedure during product testing.
Unpacking
Do not remove the plastic port protectors until you are
ready to connect hoses and fittings. This procedure will
keep dirt or foreign material from entering the pump.
Specifications
The mounting of our hydraulic gear motors conforms
to the SAE “A” two-bolt specification. The shaft also
conforms to SAE shaft specifications. See Specifications
sheet for further details.
General Safety
Information
DISCONNECT POWER AND
RELEASE ALL SYSTEM
PRESSURE BEFORE
SERVICING THIS EQUIPMENT.
1. Follow all local electrical and safety codes, as
well as the National Electrical Code (NEC) and the
Occupational Safety and Health Act (OSHA).
2. Never exceed the maximum operating speed or
pressure.
3. When using AC motors, ground the motor prop-
erly by wiring with a grounded, metal-clad raceway
system, using a separate ground wire connected
to bare metal of the motor frame, or other suitable
means.
4. Guard all moving parts.
5. Drain all liquids from the system before servicing.
6. Check hoses and connections for security before
each use.
7. Periodically check the pump/fluid motor and sys-
tem components.
8. Provide a means of pressure relief for pumps whose
discharge line can be shut off or obstructed.
9. Wear safety glasses at all times when working with
pumps/fluid motors.
10. Keep work area clean, uncluttered and properly
lighted; replace all unused tools and equipment.
11. Keep visitors at a safe distance from the work area.
12. Make the workshop child-proof with padlocks, mas-
ter switches, and by removing start keys.
13. Do not operate an engine in an enclosed area.
14. Do not spill gasoline on hot engine surfaces.
15. Store gasoline only in an approved container.
16. Keep dirty and oily cleaning rags in a tightly closed
metal container.
G
SAE (J514B) O-RING
STRAIGHT THREAD
SAE "A"
STRAIGHT
SHAFT
W/4.75” KEY
X MAX.
Y
K
J
B
READ CAREFULLY BEFORE ATTEMPTING TO ASSEMBLE, INSTALL, OPERATE OR MAINTAIN THE PRODUCT
DESCRIBED. PROTECT YOURSELF AND OTHERS BY OBSERVING ALL SAFETY INFORMATION. FAILURE
TO COMPLY WITH INSTRUCTIONS COULD RESULT IN PERSONAL INJURY AND/OR PROPERTY DAMAGE!
RETAIN INSTRUCTIONS FOR FUTURE REFERENCE.
OPERATING INSTRUCTIONS & PARTS MANUAL
ALUMINUM BIROTATIONAL GEAR MOTORS
P/N’S 1821212, 1821213, 1821214, 1821215, 1821216
Concentric P/N 2690197
4/29/2013
CAUTION!
Figure 1
C
2X
THRU
BI-ROTATIONAL
E
A
HYDRAULIC SCHEMATIC
Dimensions
P/N A B C E G J K XMAX. Y
1821212 11.25 82.5 106.4 133.0 7/8-14 19.05 32.0 95 45.5
1821213 11.25 82.5 106.4 133.0 7/8-14 19.05 32.0 100 47.8
1821214 11.25 82.5 106.4 133.0 1-1/16-12 19.05 32.0 107 51.5
1821215 11.25 82.5 106.4 133.0 1-1/16-12 19.05 32.0 112 53.7
1821216 11.25 82.5 106.4 133.0 1-5/16-12 19.05 32.0 118 56.7