REVERSE MARK

PUMPING UNITS

The Lufkin Reverse Mark or ‘RM’ Series Pumping Unit offers the customer
an improved alternative to the conventional type geometry. Although similar
in appearance to the Lufkin Conventional Pumping Unit, the RM unit geometry
can reduce the torque and power requirements on many pumping applica-
tions. In some instances a smaller reducer and prime mover can be used.
 P.O. Box 849 (Hwy 69S & FM 326)
REVERSE MARK Lufkin, Texas 75902-0849
Phone: 936/637-5437
OILFIELD PRODUCTS GROUP PUMPING UNITS Fax: 936/633-3563
www.lufkin.com

MAX. MIN.
VV UU

INSIDE OF
AA AUX. WT.

DRIVE

A G
B MIN.
I

MAX. MIN. T
V U C
MULTI-
CYLINDER
ENGINE BOTTOM OF STROKE

AB
J L

N
W
E M
F R X

Dimensional Data (inches)

Unit Size A B C E F G H I J L M N R T U V W X AA AB UU VV
RM-1824D-427-192 163.00 228.50 253.00 277.50 410.50 61.63 446.00 19.00 110.00 52.38 86.00 21.00 179.00 58.88 83.00 52.00 50.00 106.00 51.75 90.88 12.50 57.00
RM-1824D-365-192 163.00 228.50 253.00 277.50 410.50 61.63 446.00 19.00 110.00 52.38 86.00 21.00 179.00 58.88 83.00 52.00 50.00 106.00 51.75 90.88 12.50 57.00
RM-1824D-427-168 163.00 200.00 253.00 277.50 410.50 61.63 425.00 35.38 110.00 60.13 86.00 21.00 150.50 58.88 83.00 52.00 50.00 106.00 51.75 90.88 12.50 57.00
RM-1824D-365-168 163.00 200.00 253.00 277.50 410.50 61.63 425.00 35.38 110.00 60.13 86.00 21.00 150.50 58.88 83.00 52.00 50.00 106.00 51.75 90.88 12.50 57.00
RM-1280D-427-192 163.00 228.50 253.00 277.50 410.50 61.63 446.00 19.00 110.00 52.38 86.00 21.00 179.00 52.50 83.00 52.00 50.00 106.00 51.75 90.88 12.50 57.00
RM-1280D-365-192 163.00 228.50 253.00 277.50 410.50 61.63 446.00 19.00 110.00 52.38 86.00 21.00 179.00 52.50 83.00 52.00 50.00 106.00 51.75 90.88 12.50 57.00
RM-1280D-427-168 163.00 200.00 253.00 277.50 410.50 61.63 425.00 35.38 110.00 60.13 86.00 21.00 150.50 52.50 83.00 52.00 50.00 106.00 51.75 90.88 12.50 57.00
RM-1280D-365-168 163.00 200.00 253.00 277.50 410.50 61.63 425.00 35.38 110.00 60.13 86.00 21.00 150.50 52.50 83.00 52.00 50.00 106.00 51.75 90.88 12.50 57.00
RM-912D-427-192 163.00 228.50 257.88 273.50 406.50 58.00 446.00 19.00 110.00 52.38 86.00 16.13 179.00 48.50 87.00 52.00 46.75 101.00 51.75 90.88 16.50 57.00
RM-912D-365-192 163.00 228.50 257.88 273.50 406.50 58.00 446.00 19.00 110.00 52.38 86.00 16.13 179.00 48.50 87.00 52.00 46.75 101.00 51.75 90.88 16.50 57.00
RM-912D-305-192 163.00 228.50 257.88 273.50 406.50 58.00 446.00 19.00 110.00 52.38 86.00 16.13 179.00 48.50 87.00 52.00 46.75 101.00 51.75 90.88 16.50 57.00
RM-912D-427-168 163.00 200.00 257.88 273.50 406.50 58.00 425.00 35.38 110.00 60.13 86.00 16.13 150.50 48.50 87.00 52.00 46.75 101.00 51.75 90.88 16.50 57.00
RM-912D-365-168 163.00 200.00 257.88 273.50 406.50 58.00 425.00 35.38 110.00 60.13 86.00 16.13 150.50 48.50 87.00 52.00 46.75 101.00 51.75 90.88 16.50 57.00
RM-912D-305-168 163.00 200.00 257.88 273.50 406.50 58.00 425.00 35.38 110.00 60.13 86.00 16.13 150.50 48.50 87.00 52.00 46.75 101.00 51.75 90.88 16.50 57.00
RM-912D-427-144 163.00 171.50 257.88 273.50 406.50 58.00 404.00 41.50 110.00 78.13 86.00 16.13 122.00 48.50 87.00 52.00 46.75 101.00 51.75 90.88 16.50 57.00
RM-912D-365-144 163.00 171.50 257.88 273.50 406.50 58.00 404.00 41.50 110.00 78.13 86.00 16.13 122.00 48.50 87.00 52.00 46.75 101.00 51.75 90.88 16.50 57.00
RM-912D-305-144 163.00 171.50 257.88 273.50 406.50 58.00 404.00 41.50 110.00 78.13 86.00 16.13 122.00 48.50 87.00 52.00 46.75 101.00 51.75 90.88 16.50 57.00
RM-640D-305-192 163.00 228.50 257.88 270.00 403.00 54.25 446.00 19.00 110.00 52.38 86.00 16.13 179.00 41.50 90.50 52.00 46.75 101.00 51.75 90.88 23.50 57.00
RM-640D-365-168 163.00 200.00 257.88 270.00 403.00 54.25 425.00 35.38 110.00 60.13 86.00 16.13 150.50 41.50 90.50 52.00 46.75 101.00 51.75 90.88 23.50 57.00
RM-640D-305-168 163.00 200.00 257.88 270.00 403.00 54.25 425.00 35.38 110.00 60.13 86.00 16.13 150.50 41.50 90.50 52.00 46.75 101.00 51.75 90.88 23.50 57.00
RM-640D-427-144 163.00 171.50 257.88 273.50 406.50 54.25 404.00 41.50 110.00 78.13 86.00 16.13 122.00 41.50 90.50 52.00 46.75 101.00 51.75 90.88 23.50 57.00
RM-640D-365-144 163.00 171.50 257.88 270.00 403.00 54.25 404.00 41.50 110.00 78.13 86.00 16.13 122.00 41.50 90.50 52.00 46.75 101.00 51.75 90.88 23.50 57.00
RM-640D-305-144 163.00 171.50 257.88 270.00 403.00 54.25 404.00 41.50 110.00 78.13 86.00 16.13 122.00 41.50 90.50 52.00 46.75 101.00 51.75 90.88 23.50 57.00
RM-640D-256-144 163.00 171.50 257.88 270.00 403.00 54.25 404.00 41.50 110.00 78.13 86.00 16.13 122.00 41.50 90.50 52.00 46.75 101.00 51.75 90.88 23.50 57.00
RM-640D-305-120 142.00 144.50 222.00 241.00 359.00 54.25 346.00 38.38 95.00 69.38 70.00 15.88 103.00 41.50 76.00 52.00 46.75 98.50 51.75 75.88 26.75 37.75
RM-640D-256-120 142.00 144.50 222.00 241.00 359.00 54.25 346.00 38.38 95.00 69.38 70.00 15.88 103.00 41.50 76.00 52.00 46.75 98.50 51.75 75.88 26.75 37.75
NOTE: Do not use above dimensions for foundation. Request foundation plan.
Standard API models shown, other models available on request.

26
 P.O. Box 849 (Hwy 69S & FM 326)
Lufkin, Texas 75902-0849
Phone: 936/637-5437
REVERSE MARK
Fax: 936/633-3563
www.lufkin.com PUMPING UNITS OILFIELD PRODUCTS GROUP

Dimensional Data (inches)

Unit Size A B C E F G H I J L M N R T U V W X AA AB UU VV
RM-456D-305-168 142.00 202.00 222.00 241.00 359.00 51.38 388.00 19.38 95.00 40.13 76.00 15.88 160.50 38.38 79.00 52.00 46.75 98.50 51.75 75.88 26.13 37.75
RM-456D-365-144 142.00 173.00 222.00 241.00 359.00 51.38 368.00 23.50 95.00 60.13 76.00 15.88 131.50 38.38 79.00 52.00 46.75 98.50 51.75 75.88 26.13 37.75
RM-456D-305-144 142.00 173.00 222.00 241.00 359.00 51.38 368.00 23.50 95.00 60.13 76.00 15.88 131.50 38.38 79.00 52.00 46.75 98.50 51.75 75.88 26.13 37.75
RM-456D-256-144 142.00 173.00 222.00 241.00 359.00 51.38 368.00 23.50 95.00 60.13 76.00 15.88 131.50 38.38 79.00 52.00 46.75 98.50 51.75 75.88 26.13 37.75
RM-456D-365-120 142.00 144.50 222.00 241.00 359.00 51.38 346.00 38.38 95.00 69.38 70.00 15.88 103.00 38.38 79.00 52.00 46.75 98.50 51.75 75.88 26.13 37.75
RM-456D-305-120 142.00 144.50 222.00 241.00 359.00 51.38 346.00 38.38 95.00 69.38 70.00 15.88 103.00 38.38 79.00 52.00 46.75 98.50 51.75 75.88 26.13 37.75
RM-456D-256-120 142.00 144.50 222.00 241.00 359.00 51.38 346.00 38.38 95.00 69.38 70.00 15.88 103.00 38.38 79.00 52.00 46.75 98.50 51.75 75.88 26.13 37.75
RM-320D-256-144 142.00 173.00 222.00 235.50 359.50 44.75 368.00 23.50 95.00 60.13 70.00 15.88 131.50 34.00 83.50 53.00 43.00 85.50 54.00 79.00 31.00 33.25
RM-320D-305-120 142.00 144.50 222.00 235.50 359.50 44.75 346.00 38.38 95.00 69.38 70.00 15.88 103.00 34.00 83.50 53.00 43.00 85.50 54.00 79.00 31.00 33.25
RM-320D-256-120 142.00 144.50 222.00 235.50 359.50 44.75 346.00 38.38 95.00 69.38 70.00 15.88 103.00 34.00 83.50 53.00 43.00 85.50 54.00 79.00 31.00 33.25
RM-320D-213-120 142.00 144.50 222.00 235.50 359.50 44.75 346.00 38.38 95.00 69.38 70.00 15.88 103.00 34.00 83.50 53.00 43.00 85.50 54.00 79.00 31.00 33.25
RM-320D-305-100 142.00 120.50 222.00 235.50 359.50 44.75 328.00 59.00 95.00 69.38 70.00 15.88 79.00 34.00 83.50 53.00 43.00 85.50 54.00 79.00 31.00 33.25
RM-320D-256-100 142.00 120.50 222.00 235.50 359.50 44.75 328.00 59.00 95.00 69.38 70.00 15.88 79.00 34.00 83.50 53.00 43.00 85.50 54.00 79.00 31.00 33.25
RM-320D-246-86 127.00 103.50 190.13 216.50 323.50 44.75 283.00 36.88 78.00 73.63 70.00 15.88 62.00 34.00 66.50 53.00 43.00 85.50 37.13 62.13 30.00 33.25
RM-228D-213-120 142.00 144.50 222.00 228.50 359.00 38.63 346.00 38.38 95.00 69.38 70.00 15.88 103.00 30.00 87.00 53.00 37.00 78.50 54.00 79.00 28.00 33.25
RM-228D-256-100 142.00 120.50 222.00 228.50 359.00 38.63 328.00 59.00 95.00 69.38 70.00 15.88 79.00 30.00 87.00 53.00 37.00 78.50 54.00 79.00 28.00 33.25
RM-228D-213-100 127.00 120.00 190.13 209.50 323.00 39.13 295.00 23.00 78.00 73.75 70.00 15.88 78.50 30.00 70.00 53.00 37.00 78.50 37.13 62.13 27.88 33.25
RM-228D-173-100 127.00 120.00 190.13 209.50 323.00 39.13 295.00 23.00 78.00 73.75 70.00 15.88 78.50 30.00 70.00 53.00 37.00 78.50 37.13 62.13 27.88 33.25
RM-228D-246-86 127.00 103.50 190.13 209.50 323.00 39.13 283.00 36.88 78.00 73.63 70.00 15.88 62.00 30.00 70.00 53.00 37.00 78.50 37.13 62.13 27.88 33.25
RM-228D-213-86 127.00 103.50 190.13 209.50 323.00 39.13 283.00 36.88 78.00 73.63 70.00 15.88 62.00 30.00 70.00 53.00 37.00 78.50 37.13 62.13 27.88 33.25
RM-228D-200-74 127.00 89.00 190.13 209.50 323.00 39.13 273.00 46.88 78.00 77.63 70.00 15.88 47.50 30.00 70.00 53.00 37.00 78.50 37.13 62.13 27.88 33.25
RM-228D-173-74 127.00 89.00 190.13 209.50 323.00 39.13 273.00 46.88 78.00 77.63 70.00 15.88 47.50 30.00 70.00 53.00 37.00 78.50 37.13 62.13 27.88 33.25

Structural Data
Polished Rod Stroke Lengths Walking Wireline Hanger Crank Pin Equalizer Center
Unit Size Capacity (lbs.) (inches) Beam (inches) Cranks Bearing Bearing Bearing
RM-1824D-427-192 42,700 192, 158, 127 W36 x 260 1-3/8 x 16 CTRS. 90110 RMA 0S 00R 00TG
RM-1280D-427-192 42,700 192, 158, 127 W36 x 260 1-3/8 x 16 CTRS. 90110 RMA 0S 00R 00TG
RM-912D-427-192 42,700 192, 158, 127 W36 x 260 1-3/8 x 16 CTRS. 90110 RMA 0S 00R 00TG
RM-1824D-365-192 36,500 192, 158, 127 W36 x 245 1-3/8 x 16 CTRS. 90110 RMA 0S 00R 0TGB
RM-1280D-365-192 36,500 192, 158, 127 W36 x 245 1-3/8 x 16 CTRS. 90110 RMA 0S 00R 0TGB
RM-912D-365-192 36,500 192, 158, 127 W36 x 245 1-3/8 x 16 CTRS. 90110 RMA 0S 00R 0TGB
RM-912D-305-192 30,500 192, 158, 127 W33 x 221 1-3/8 x 16 CTRS. 90110 RMA 1SE 00R 0TGB
RM-640D-305-192 30,500 192, 158, 127 W33 x 221 1-3/8 x 16 CTRS. 90110 RMA 1SE 00R 0TGB
RM-1824D-427-168 42,700 168, 139, 111 W36 x 245 1-3/8 x 16 CTRS. 90110 RMA 0S 00R 0TGB
RM-1280D-427-168 42,700 168, 139, 111 W36 x 245 1-3/8 x 16 CTRS. 90110 RMA 0S 00R 0TGB
RM-912D-427-168 42,700 168, 139, 111 W36 x 245 1-3/8 x 16 CTRS. 90110 RMA 0S 00R 0TGB
RM-1824D-365-168 36,500 168, 139, 111 W33 x 221 1-3/8 x 16 CTRS. 90110 RMA 1SE 00R 0TGB
RM-1280D-365-168 36,500 168, 139, 111 W33 x 221 1-3/8 x 16 CTRS. 90110 RMA 1SE 00R 0TGB
RM-912D-365-168 36,500 168, 139, 111 W33 x 221 1-3/8 x 16 CTRS. 90110 RMA 1SE 00R 0TGB
RM-640D-365-168 36,500 168, 139, 111 W33 x 221 1-3/8 x 16 CTRS. 90110 RMA 1SE 00R 0TGB
RM-912D-305-168 30,500 168, 139, 111 W33 x 201 1-1/4 x 16 CTRS. 90110 RMA 1SE 0RA 0TGB
RM-640D-305-168 30,500 168, 139, 111 W33 x 201 1-1/4 x 16 CTRS. 90110 RMA 1SE 0RA 0TGB
RM-456D-305-168 30,500 168, 139, 112 W33 x 201 1-1/4 x 16 CTRS. 7895 RM 1SE 0RA 0TGB
RM-912D-427-144 42,700 144, 119, 95 W33 x 201 1-3/8 x 16 CTRS. 90110 RMA 1SE 00R 0TGB
RM-640D-427-144 42,700 144, 119, 95 W33 x 201 1-3/8 x 16 CTRS. 90110 RMA 1SE 00R 0TGB
RM-912D-365-144 36,500 144, 119, 95 W33 x 201 1-3/8 x 16 CTRS. 90110 RMA 1SE 0RA 0TGB
RM-640D-365-144 36,500 144, 119, 95 W33 x 201 1-3/8 x 16 CTRS. 90110 RMA 1SE 0RA 0TGB
RM-456D-365-144 36,500 144, 119, 96 W33 x 201 1-3/8 x 16 CTRS. 7895 RM 1SE 0RA 0TGB
RM-912D-305-144 30,500 144, 119, 95 W30 x 173 1-1/4 x 16 CTRS. 90110 RMA 1SE 0RA 0TGB
RM-640D-305-144 30,500 144, 119, 95 W30 x 173 1-1/4 x 16 CTRS. 90110 RMA 1SE 0RA 0TGB
RM-456D-305-144 30,500 144, 119, 96 W30 x 173 1-1/4 x 16 CTRS. 7895 RM 1SE 0RA 0TGB
RM-640D-256-144 25,600 144, 119, 95 W30 x 173 1-1/4 x 16 CTRS. 90110 RMA 1SE 0RA 0TGB
RM-456D-256-144 25,600 144, 119, 96 W30 x 173 1-1/4 x 16 CTRS. 7895 RM 2SE 0RA 1TGC
RM-320D-256-144 25,600 144, 119, 96 W30 x 173 1-1/4 x 16 CTRS. 7895 RM 2SE 0RA 1TGC
RM-456D-365-120 36,500 120, 100, 80 W30 x 173 1-3/8 x 12 CTRS. 7895 RM 1SE 0RA 0TGB
RM-640D-305-120 30,500 120, 100, 80 W27 x 146 1-1/4 x 12 CTRS. 7895 RM 2SE 0RA 1TGC
RM-456D-305-120 30,500 120, 100, 80 W27 x 146 1-1/4 x 12 CTRS. 7895 RM 2SE 0RA 1TGC
RM-320D-305-120 30,500 120, 100, 80 W27 x 146 1-1/4 x 12 CTRS. 7895 RM 2SE 0RA 1TGC
RM-640D-256-120 25,600 120, 100, 80 W27 x 146 1-1/8 x 12 CTRS. 7895 RM 2SE 1RA 1TGC
RM-456D-256-120 25,600 120, 100, 80 W27 x 146 1-1/8 x 12 CTRS. 7895 RM 2SE 1RA 1TGC
RM-320D-256-120 25,600 120, 100, 80 W27 x 146 1-1/8 x 12 CTRS. 7895 RM 2SE 1RA 1TGC
RM-320D-213-120 21,300 120, 100, 80 W27 x 146 1-1/8 x 12 CTRS. 7895 RM 2SE 2RB 2TGC
RM-228D-213-120 21,300 120, 100, 80 W27 x 146 1-1/8 x 12 CTRS. 7895 RM 2SE 2RB 2TGC
RM-320D-305-100 30,500 100, 83, 67 W27 x 146 1-1/4 x 12 CTRS. 7895 RM 2SE 1RA 1TGC
RM-320D-256-100 25,600 100, 83, 67 W27 x 146 1-1/8 x 12 CTRS. 7895 RM 2SE 2RB 2TGC
RM-228D-256-100 25,600 100, 83, 67 W27 x 146 1-1/8 x 12 CTRS. 7895 RM 2SE 2RB 2TGC
RM-228D-213-100 21,300 100, 84, 69 W24 x 117 1-1/8 x 12 CTRS. 7078 RM 3SF 2RB 2TGC
RM-228D-173-100 17,300 100, 84, 69 W24 x 104 1-1/8 x 12 CTRS. 7078 RM 3SF 2RB 4TG
RM-320D-246-86 24,600 86, 72, 59 W24 x 117 1-1/8 x 12 CTRS. 7078 RM 3SF 2RB 2TGC
RM-228D-246-86 24,600 86, 72, 59 W24 x 117 1-1/8 x 12 CTRS. 7078 RM 3SF 2RB 2TGC
RM-228D-213-86 21,300 86, 72, 59 W24 x 104 1-1/8 x 12 CTRS. 7078 RM 3SF 2RB 2TGC
RM-228D-200-74 20,000 74, 62, 51 W24 x 94 1 x 9 CTRS. 7078 RM 5SA 3RA 4TG
RM-228D-173-74 17,300 74, 62, 51 W24 x 84 1 x 9 CTRS. 7078 RM 5SA 3RA 4TG

27
 P.O. Box 849 (Hwy 69S & FM 326)
REVERSE MARK Lufkin, Texas 75902-0849
Phone: 936/637-5437
OILFIELD PRODUCTS GROUP PUMPING UNITS Fax: 936/633-3563
www.lufkin.com

The Reverse Mark Units are similiar in appearance

C A
to Lufkin Conventional Units; but in some cases,
due to its unique geometry, a smaller reducer and P
prime mover can be used.
H
R

I
API Geometry Dimensions (inches)
PHASE T.F. @ (90° - S.U.
Unit Size A C P I H G R1, R2, R3 ANGLE Phase Angle) (Est.)
RM-1824D-427-192 228.5 118 171 163 274 111 45, 38, 31 -9.0 86.11 -1650
RM-1824D-365-192 228.5 118 171 163 274 111 45, 38, 31 -9.0 86.11 -1650
RM-1824D-427-168 200.0 118 171 163 274 111 45, 38, 31 -9.0 75.37 -515
RM-1824D-365-168 200.0 118 171 163 274 111 45, 38, 31 -9.0 75.37 -515
RM-1280D-427-192 228.5 118 171 163 274 111 45, 38, 31 -9.0 86.11 -1650
RM-1280D-365-192 228.5 118 171 163 274 111 45, 38, 31 -9.0 86.11 -1650
RM-1280D-427-168 200.0 118 171 163 274 111 45, 38, 31 -9.0 75.37 -515
RM-1280D-365-168 200.0 118 171 163 274 111 45, 38, 31 -9.0 75.37 -515
RM-912D-427-192 228.5 118 171 163 274 111 45, 38, 31 -12.0 85.35 -1650
RM-912D-365-192 228.5 118 171 163 274 111 45, 38, 31 -12.0 85.35 -1650
RM-912D-305-192 228.5 118 171 163 274 111 45, 38, 31 -9.0 86.11 -1600
RM-912D-427-168 200.0 118 171 163 274 111 45, 38, 31 -12.0 74.71 -515
RM-912D-365-168 200.0 118 171 163 274 111 45, 38, 31 -9.0 75.37 -515
RM-912D-305-168 200.0 118 171 163 274 111 45, 38, 31 -9.0 75.37 -1070
RM-912D-427-144 171.5 118 171 163 274 111 45, 38, 31 -9.0 64.63 630
RM-912D-365-144 171.5 118 171 163 274 111 45, 38, 31 -9.0 64.63 50
RM-912D-305-144 171.5 118 171 163 274 111 45, 38, 31 -9.0 64.63 50
RM-640D-305-192 228.5 118 171 163 274 111 45, 38, 31 -12.0 85.35 -1600
RM-640D-365-168 200.0 118 171 163 274 111 45, 38, 31 -12.0 74.71 -515
RM-640D-305-168 200.0 118 171 163 274 111 45, 38, 31 -9.0 75.37 -1070
RM-640D-427-144 171.5 118 171 163 274 111 45, 38, 31 -12.0 64.06 630
RM-640D-365-144 171.5 118 171 163 274 111 45, 38, 31 -9.0 64.63 50
RM-640D-305-144 171.5 118 171 163 274 111 45, 38, 31 -9.0 64.63 50
RM-640D-256-144 171.5 118 171 163 274 111 45, 38, 31 -9.0 64.63 -140
RM-640D-305-120 144.5 103 149 142 237.88 96 39, 33, 27 -12.5 53.50 335
RM-640D-256-120 144.5 103 149 142 237.88 96 39, 33, 27 -12.5 53.50 235
RM-456D-305-168 202.0 103 149 142 237.88 96 39, 33, 27 -14.0 74.40 -1580
RM-456D-365-144 173.0 103 149 142 237.88 96 39, 33, 27 -14.0 63.72 -765
RM-456D-305-144 173.0 103 149 142 237.88 96 39, 33, 27 -12.5 64.05 -700
RM-456D-256-144 173.0 103 149 142 237.88 96 39, 33, 27 -12.5 64.05 -870
RM-456D-365-120 144.5 103 149 142 237.88 96 39, 33, 27 -12.5 53.50 680
RM-456D-305-120 144.5 103 149 142 237.88 96 39, 33, 27 -12.5 53.50 335
RM-456D-256-120 144.5 103 149 142 237.88 96 39, 33, 27 -12.5 53.50 235
RM-320D-256-144 173.0 103 149 142 237.88 96 39, 33, 27 -14.0 63.72 -870
RM-320D-305-120 144.5 103 149 142 237.88 96 39, 33, 27 -14.0 53.22 335
RM-320D-256-120 144.5 103 149 142 237.88 96 39, 33, 27 -12.5 53.50 235
RM-320D-213-120 144.5 103 149 142 237.88 96 39, 33, 27 -12.5 53.50 40
RM-320D-305-100 120.5 103 149 142 237.88 96 39, 33, 27 -12.5 44.61 600
RM-320D-256-100 120.5 103 149 142 237.88 96 39, 33, 27 -12.5 44.61 600
RM-320D-246-86 103.5 92 134 127 206 79 35, 30, 25 -14.0 38.29 720
RM-228D-213-120 144.5 103 149 142 237.88 96 39, 33, 27 -14.0 53.22 40
RM-228D-256-100 120.5 103 149 142 237.88 96 39, 33, 27 -14.0 44.38 600
RM-228D-213-100 120.0 92 134 127 206 79 35, 30, 25 -14.0 44.39 90
RM-228D-173-100 120.0 92 134 127 206 79 35, 30, 25 -14.0 44.39 90
RM-228D-246-86 103.5 92 134 127 206 79 35, 30, 25 -14.0 38.29 720
RM-228D-213-86 103.5 92 134 127 206 79 35, 30, 25 -14.0 38.29 340
RM-228D-200-74 89.0 92 134 127 206 79 35, 30, 25 -14.0 32.93 680
RM-228D-173-74 89.0 92 134 127 206 79 35, 30, 25 -14.0 32.93 680

28
 P.O. Box 849 (Hwy 69S & FM 326)
Lufkin, Texas 75902-0849
Phone: 936/637-5437
REVERSE MARK
Fax: 936/633-3563
www.lufkin.com PUMPING UNITS OILFIELD PRODUCTS GROUP

Counterbalance Data (shown in lbs., effective at polished rod with weights at maximum position, including structural unbalance.)
RM-1824D-427-168
RM-1824D-427-192 RM-1280D-427-168
RM-1280D-427-192 RM-1824D-365-168
RM-1824D-365-192 RM-912D-427-192 RM-1280D-365-168 RM-912D-427-168 RM-912D-305-168
Unit Size RM-1280D-365-192 RM-912D-365-192 RM-912D-305-192 RM-640D-305-192 RM-912D-365-168 RM-640D-365-168 RM-640D-305-168
Stroke 192" 192" 192" 192" 168" 168" 168"
Structural Unbalance – 1,650 lbs. – 1,650 lbs. – 1,600 lbs. – 1,600 lbs. – 515 lbs. – 515 lbs. – 1,070 lbs.
Cranks 90110 RMA 90110 RMA 90110 RMA 90110 RMA 90110 RMA 90110 RMA 90110 RMA
C’Bal., Cranks Only 4,725 4,785 4,775 4,835 6,770 6,835 6,215
4 No. OORO Counterweights 18,565 18,750 18,615 18,800 22,585 22,790 22,030
4 No. OOS Aux. Weights 22,740 22,965 22,790 23,015 27,355 27,605 26,800
8 No. OOS Aux. Weights 26,915 27,180 26,965 27,230 32,125 32,420 –....
4 No. ORO Counterweights 16,800 16,965 16,850 17,015 20,565 20,750 20,010
4 No. OS Aux. Weights 20,810 21,010 20,860 21,060 25,145 25,370 24,590
8 No. OS Aux. Weights 24,820 25,055 24,870 25,105 29,725 29,990 29,170
4 No. OARO Counterweights 14,950 15,100 15,000 15,150 18,450 18,620 17,895
4 No. OAS Aux. Weights 18,115 18,295 18,165 18,345 22,065 22,270 21,510
8 No. OAS Aux. Weights 21,280 21,490 21,330 21,540 25,680 25,920 25,125
4 No. 1RO Counterweights 12,680 12,810 12,730 12,860 15,855 16,005 15,300
4 No. 1S Aux. Weights 15,125 15,275 15,175 15,325 18,650 18,825 18,095
8 No. 1S Aux. Weights 17,570 17,740 17,620 17,790 21,445 21,645 20,890
4 No. 2RO Counterweights 11,350 11,465 11,395 11,515 14,335 14,465 13,780
4 No. 2S Aux Weights 13,725 13,860 13,770 13,910 17,045 17,200 16,490
8 No. 2S Aux. Weights 16,100 16,255 16,145 16,305 19,755 19,935 19,200
4 No. 3CRO Counterweights 10,060 10,165 10,110 10,215 12,865 12,980 12,310
4 No. 3BS Aux. Weights 12,360 12,485 12,410 12,535 15,490 15,630 14,935
8 No. 3BS Aux. Weights 14,660 *14,805 *14,710 14,855 *18,115 18,280 *17,560
4 No. 5ARO Counterweights 8,585 8,680 8,635 8,730 11,180 11,285 10,625
4 No. 5A Aux. Weights 10,135 10,240 10,185 10,290 12,950 13,070 12,395
8 No. 5A Aux. Weights 11,685 *11,800 *11,735 11,850 *14,720 14,855 *14,165
4 No. 5CRO Counterweights 7,560 7,645 7,610 7,695 10,010 10,105 9,455
4 No. 5C Aux. Weights 8,960 9,060 9,010 9,110 11,610 11,720 11,055
8 No. 5C Aux. Weights 10,360 10,475 10,410 10,525 13,210 13,335 12,655
RM-640D-256-120
RM-640D-305-120 RM-456D-256-120
Unit Size RM-456D-256-144 RM-320D-256-144 RM-456D-365-120 RM-456D-305-120 RM-320D-305-120 RM-320D-256-120 RM-320D-213-120
Stroke 144" 144" 120" 120" 120" 120" 120"
Structural Unbalance – 870 lbs. – 870 lbs. 680 lbs. 335 lbs. 335 lbs. 235 lbs. 40 lbs.
Cranks 7895 RM 7895 RM 7895 RM 7895 RM 7895 RM 7895 RM 7895 RM
C’Bal., Cranks Only 5,405 5,435 8,190 7,845 7,885 7,745 7,550
4 No. ORO Counterweights 18,405 18,505 23,755 23,410 23,530 23,310 –.
4 No. OS Aux. Weights 22,720 22,845 28,925 28,580 28,725 – –
8 No. OS Aux. Weights – – 34,095 – – – –
4 No. OARO Counterweights 16,560 16,650 21,545 21,200 21,310 21,100 –
4 No. OAS Aux. Weights 20,015 20,120 25,680 25,335 25,465 – –
8 No. OAS Aux. Weights – – 29,815 – – – –
4 No. 1RO Counterweights 14,110 14,185 18,610 18,265 18,360 18,165 17,970
4 No. 1S Aux. Weights 16,785 16,875 21,815 21,470 21,580 21,370 –
8 No. 1S Aux. Weights 19,460 *19,565 25,020 24,675 24,800 24,575 –
4 No. 2RO Counterweights 12,655 12,725 16,870 16,525 16,610 16,425 16,230
4 No. 2S Aux Weights 15,255 15,335 19,980 19,635 19,735 19,535 16,391
8 No. 2S Aux. Weights 17,855 *17,945 23,090 22,745 22,860 22,645 –
4 No. 3CRO Counterweights 11,290 11,350 15,235 14,890 14,970 14,790 14,595
4 No. 3BS Aux. Weights 13,825 13,900 18,275 17,930 18,025 17,830 17,635
8 No. 3BS Aux. Weights 16,360 *16,450 21,315 20,970 *21,080 *20,870 *20,675
4 No. 5ARO Counterweights 9,710 9,765 13,345 13,000 13,070 12,900 12,705
4 No. 5A Aux. Weights 11,435 11,500 15,410 15,065 15,150 14,965 14,770
8 No. 5A Aux. Weights 13,160 *13,235 17,475 17,130 *17,230 *17,030 *16,835
4 No. 5CRO Counterweights 8,575 8,625 11,990 11,645 11,705 11,545 11,350
4 No. 5C Aux. Weights 10,140 10,200 13,865 13,520 13,590 13,420 13,225
8 No. 5C Aux. Weights 11,705 *11,775 15,740 15,395 15,475 15,295 15,100
4 NO. 6RO Counterweights 7,870 7,910 11,140 10,795 10,850 10,695 10,500
4 No. 6 Aux. Weights 8,800 8,845 12,250 11,905 11,970 11,805 11,610
8 No. 6 Aux. Weights 9,730 9,780 13,360 13,015 13,090 12,915 12,720
4 No. 7RO Counterweights 6,975 7,015 10,070 9,725 9,775 9,625 9,430
4 No. 7 Aux.Weights 7,675 7,715 10,905 10,560 10,615 10,460 10,265
8 No. 7 Aux. Weights 8,375 8,415 11,740 11,395 11,455 11,295 11,100
* Use only one aux. weight per counterweight on belt cover side on 912D and 320D units.
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 P.O. Box 849 (Hwy 69S & FM 326)
REVERSE MARK Lufkin, Texas 75902-0849
Phone: 936/637-5437
OILFIELD PRODUCTS GROUP PUMPING UNITS Fax: 936/633-3563
www.lufkin.com

Counterbalance Data (shown in lbs., effective at polished rod with weights at maximum position, including structural unbalance.)
RM-912D-365-144
RM-640D-365-144
RM-912D-305-144
Unit Size RM-456D-305-168 RM-912D-427-144 RM-640D-427-144 RM-640D-305-144 RM-456D-365-144 RM-456D-305-144 RM-640D-256-144
Stroke 168" 144" 144" 144" 144" 144" 144"
Structural Unbalance – 1,580 lbs. 630 lbs. 630 lbs. 50 lbs. – 765 lbs. – 700 lbs. – 140 lbs.
Cranks 7895 RM 90110 RMA 90110 RMA 90110 RMA 7895 RM 7895 RM 90110 RMA
C’Bal., Cranks Only 3,820 9,125 9,200 8,545 5,540 5,575 8,355
4 No. OORO Counterweights – 27,565 27,805 26,985 – – –
4 No. OOS Aux. Weights – 33,130 33,420 32,550 – – –
8 No. OOS Aux. Weights – 38,695 39,035 – – – –
4 No. ORO Counterweights 15,010 25,215 25,430 24,635 18,610 18,575 24,445
4 No. OS Aux. Weights 18,725 30,555 30,820 29,975 22,950 22,890 –
8 No. OS Aux. Weights 22,440 35,895 36,210 – 27,290 27,205 –
4 No. OARO Counterweights 13,425 22,745 22,945 22,165 16,755 16,730 21,975
4 No. OAS Aux. Weights 16,400 26,965 27,200 26,385 20,225 20,185 –
8 No. OAS Aux. Weights 19,375 31,185 31,455 30,605 23,695 23,640 –
4 No. 1RO Counterweights 11,310 19,270 19,890 19,140 14,290 14,280 18,950
4 No. 1S Aux. Weights 13,615 22,980 23,175 22,400 16,980 16,955 22,210
8 No. 1S Aux. Weights 15,920 26,240 26,460 25,660 19,670 19,630 25,470
4 No. 2RO Counterweights 10,060 17,950 18,100 17,370 12,830 12,825 17,810
4 No. 2S Aux Weights 12,295 21,110 21,290 20,530 15,440 15,425 20,340
8 No. 2S Aux. Weights 14,530 24,270 24,480 23,690 18,050 18,025 23,500
4 No. 3CRO Counterweights 8,890 16,230 16,370 15,650 11,455 11,460 15,460
4 No. 3BS Aux. Weights 11,075 19,295 19,460 18,715 14,005 13,995 18,525
8 No. 3BS Aux. Weights 13,260 *22,360 22,550 *21,780 16,555 16,530 21,590
4 No. 5ARO Counterweights 7,530 14,270 14,390 13,690 9,870 9,880 13,500
4 No. 5A Aux. Weights 9,015 16,330 16,470 15,750 11,605 11,605 15,560
8 No. 5A Aux. Weights 10,500 *18,390 18,550 *17,810 13,340 13,330 17,620
4 No. 5CRO Counterweights 6,550 12,905 13,010 12,325 8,730 8,745 12,135
4 No. 5C Aux. Weights 7,900 14,770 14,895 14,190 10,305 10,310 14,000
8 No. 5C Aux. Weights 9,250 16,635 16,780 16,055 11,880 11,875 15,865
4 NO. 6RO Counterweights 5,940 – – – 8,015 8,040 –
4 No. 6 Aux. Weights 6,740 – – – 8,950 8,970 –
8 No. 6 Aux. Weights 7,540 – – – 9,885 9,900 –
4 No. 7RO Counterweights 5,175 – – – 7,120 7,145 –
4 No. 7 Aux.Weights 5,775 – – – 7,820 7,845 –
8 No. 7 Aux. Weights 6,375 – – – 8,520 8,545 –
RM-320D-305-100 RM-228D-213-100 RM-320D-246-86 RM-228D-200-74
Unit Size RM-228D-213-120 RM-320D-256-100 RM-228D-256-100 RM-228D-173-100 RM-228D-246-86 RM-228D-213-86 RM-228D-173-74
Stroke 120" 100" 100" 100" 86" 86" 74"
Structural Unbalance 40 lbs. 600 lbs. 600 lbs. 90 lbs. 720 lbs. 340 lbs. 680 lbs.
Cranks 7895 RM 7895 RM 7895 RM 7078 RM 7078 RM 7078 RM 7078 RM
C’Bal., Cranks Only 7,590 9,605 9,655 4,670 6,030 5,650 6,855
4 No. ORO Counterweights – 28,270 – – – – –
4 No. OARO Counterweights – 25,620 – – – – –
4 No. 1RO Counterweights 18,065 22,100 22,360 – – – –
4 No. 1S Aux. Weights – 25,940 – – – – –
4 No. 2RO Counterweights 16,315 20,015 20,120 12,595 15,215 14,835 17,535
4 No. 2S Aux Weights 19,440 23,745 23,870 15,435 18,505 18,125 –
8 No. 2S Aux. Weights – 27,475 – 18,275 21,800 – –
4 No. 3CRO Counterweights 14,675 18,055 18,150 11,195 13,590 13,210 15,645
4 No. 3BS Aux. Weights 17,730 21,700 21,810 14,005 16,850 16,470 –
8 No. 3BS Aux. Weights **20,785 *25,345 – 16,815 *20,110 19,730 –
4 No. 5ARO Counterweights 12,775 15,790 15,870 9,530 11,665 11,285 13,405
4 No. 5A Aux. Weights 14,855 18,270 18,360 11,475 13,920 13,540 16,030
8 No. 5A Aux. Weights 16,935 *20,750 20,850 13,425 *16,180 15,800 –
4 No. 5CRO Counterweights 11,410 14,160 14,235 8,265 10,195 9,815 11,700
4 No. 5C Aux. Weights 13,295 16,410 16,495 10,040 12,255 11,875 14,095
8 No. 5C Aux. Weights 15,180 18,660 18,755 11,815 *14,310 13,930 16,485
4 NO. 6RO Counterweights 10,555 13,145 13,210 7,475 9,285 8,905 10,640
4 No. 6 Aux. Weights 11,675 14,480 14,550 8,535 10,510 10,130 12,065
8 No. 6 Aux. Weights 12,795 15,815 15,890 9,595 11,735 11,355 13,490
4 No. 7RO Counterweights 9,480 11,865 11,925 6,470 8,120 7,740 9,280
4 No. 7 Aux.Weights 10,320 12,870 12,935 7,270 9,045 8,665 10,360
8 No. 7 Aux. Weights 11,160 13,875 13,945 8,070 9,975 9,595 11,440
* Use only one aux. weight per counterweight on belt cover side on 912D and 320D units. ** Use only one aux. weight per counterweight on belt cover side on 228D units.

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