OPERATOR’S MANUAL 6720X-XXX
INCLUDING: SERVICE KITS, TROUBLESHOOTING, PARTS LIST & DISASSEMBLY & REASSEMBLY.
RELEASED: 7-24-98
REVISED: 6-1-10
(REV. L)

FOUR-BALL STYLE LOWER PUMP ENDS

67200-XXX (3” i.d.)

67201-XXX (3-1/2” i.d.)

Also covers 637317-XXX and 637318-XXX service kits.

READ THIS MANUAL CAREFULLY BEFORE INSTALLING,

OPERATING OR SERVICING THIS EQUIPMENT.

It is the responsibility of the employer to place this information in the hands of the operator. Keep for future reference.
The original language of this manual is English.
INGERSOLL RAND COMPANY LTD
209 NORTH MAIN STREET – BRYAN, OHIO 43506
(800) 495-0276 y FAX (800) 892-6276 © 2010 CCN 99745416
www.ingersollrandproducts.com

SERVICE KITS

Use only genuine ARO® replacement parts to assure com-
patible pressure rating and longest service life.
637317-X4X for general repair of 67200-XXX lower pump
ends.
637318-X4X for general repair of 67201-XXX lower pump
ends.

LOWER PUMP END DISASSEMBLY

NOTE: All threads are right hand.
CAUTION: Items (9) tube and (26) pump rod are ceramic
coated. Handle with care so as not to damage them in any
way during disassembly or reassembly.
Unscrew four (4) bolts, releasing (34) inlet body, two (20)
“O” rings, (32 and 39) lower seats, two (35) “O” rings and
two (21) balls.
Unscrew four (4) bolts, releasing (6) ball cap, two (15) “O”
rings, two (27) upper seats, two (28) “O” rings and two (14)
balls.
Unscrew (1) solvent cup, releasing (77) bushing, (44)
washer, (50) washer, five (51 and 52) “V” packings, (53)
washer and (43) wave spring.
Unscrew (2) gland nut, releasing (38) “O” ring.
Unscrew three (12) tie rod nuts and pull (11) upper body
from pump.
Remove two (17) downtubes and four (16) seals.
Remove (9) tube and two (7) “O” rings.
Pull (26) pump rod assembly from (9) tube.
Remove (31) cotter pin and unscrew (30) nut, releasing
two (29) followers and two (65) cup packings.
Remove (40) roll pin and unscrew (37) adapter, where
applicable.

LOWER PUMP END REASSEMBLY

NOTE: Inspect and replace old parts with new parts as neces-
sary. Look for deep scratches on metallic surfaces. Replace all
“O” rings upon reassembly. Lubricate all threads upon reas-
sembly. Refer to sealant and torque notes on page 3.
Screw (37) adapter to (26) pump rod, securing with (40)
roll pin, where applicable.
Assemble (29) followers into (65) cup packings. As-
semble to (26) pump rod, securing with (30) nut. NOTE:
y
y
y
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
1.
2.

LOWER PUMP END DESCRIPTION CHART

6720 X - X X X
Cylinder Size
0 - 3” i.d.
1 - 3-1/2” i.d.
Service Kit Selection
EXAMPLE: Lower Pump End # 67200-F4B
Service Kit # 637317-F4B
6720X - X X X
Packing Plunger
63731X - X 4 X
Packing Material
7 - Glass lled PTFE (upper)
Virgin PTFE (lower)
C - UHMW-PE (upper and lower)
F - UHMW-PE / Leather staggered (upper)
UHMW-PE (lower)
P - UHMW-PE / Glass  lled PTFE staggered (upper)
UHMW-PE (lower)
R - Glass lled PTFE / UHMW-PE staggered (upper)
Virgin PTFE (lower)
Plunger Type
B - Hardened stainless steel with ceramic coating (use “B” for
service kit selection)
G - Hardened stainless steel with ceramic coating (large motors)
(use “C” for service kit selection)
Spring Arrangement
4 - Multiple wave spring
(continued on page 4)
Figure 1