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Page 2 of 4 66266-XXX-B (en)
MATERIAL CODE
[B] = Nitrile [GFT] = Glass lled PTFE
[Br] = Brass [L] = Leather
[C] = Carbon Steel [SH] = Hard Stainless Steel
[Co] = Copper [SS] = Stainless Steel
[D] = Acetal [T] = PTFE
[DI] = Ductile Iron [UH] = UHMW-PE
LOWER PUMP DISASSEMBLY
NOTE: All threads are right hand.
Remove the (6) pump body from the (9) suction tube by
sliding it o of the three (10) tie rods.
Remove the (7) gasket from the top of the (9) suction
tube.
Remove the three (10) tie rods.
Pull the (9) suction tube off of the middle packing and
valve section and out of (25) check stop.
Push the (26) plunger rod down to expose the primer
components.
Remove the (33) lock nut, (32) primer button and (31)
primer plate from the (30) primer rod.
Pull up on the (26) rod and remove the middle packing,
valve section and (30) primer rod from the (15) pressure
chamber body.
Remove the (7) gasket from the (25) check stop.
Using a at bladed screwdriver to pry on the slot in the
(25) check stop, remove the (25) check stop, (21) check,
(22) seat and two (23) “O” rings from the (15) pressure
chamber body.
Remove the (24) “O” ring from the (25) check stop.
Using a retaining ring pliers, remove the (37) retaining
ring from the (21) check, allowing removal of the (65) “U”
cup packing.
Using the wrench ats provided, unthread and remove
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12
.
the (30) primer rod from the (34) valve rod and unthread
and remove the (34) valve rod from the (26) plunger rod.
CAUTION: Be careful not to mar or damage the surfaces
of these rods.
Slide the middle packing assembly o of the (34) valve
rod.
Clamp the (28) seat in a vise and remove the (36) valve
seat nut, allowing removal of the middle packing com-
ponents.
Remove the (1) solvent cup assembly from the (6) pump
body, allowing removal of the upper packing compo-
nents.
LOWER PUMP 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.
Assemble the (65) “U” cup packing into the (21) check,
securing with the (37) retaining ring.
Assemble the (54) female packing washer, (55 and 56) “V”
packings, (57) male packing washer and (47) wave spring
to the (28) seat, securing with the (36) valve seat nut (re-
fer to page 3).
Slide the (21) check (beveled end rst) onto the end of
the (30) primer rod opposite the wrench flats (refer to
page 3).
Thread the (30) primer rod into the (34) valve rod and
tighten.
Assemble the (24) “O” ring to the groove in the (25) check
stop.
Slide the (25) check stop onto the (34) valve rod and (30)
primer rod assembly and t over the (21) check.
Slide the (28) seat and middle packing assembly over the
13.
14.
15.
1.
2.
3.
4.
5.
6.
7
.
PARTS LIST / 66266-XXX-B
Item Description
(size)
(Qty) Part No. [Mtl] Item Description
(size)
(Qty) Part No. [Mtl]
1 Solvent Cup Assembly (1) 66866-1 [C]
4Rod
(not shown, used to adjust item 1)
(1) 93456-1 [C]
6 Pump Body (1) 90848 [DI]
9
7 Gasket (2) 90306 [Co]
9 Suction Tube (1) 91844 [C]
10 Tie Rod (3) 91725 [C]
11 Nut
(5/8” - 18)
(3) Y11-110-N [C]
15 Pressure Chamber Body (1) 91730 [DI]
21 Check (1) 90916 [SH]
22 Seat (1) 94791 [SH]
9
23 “O” Ring
(3/32” x 2-5/8” o.d.)
(2) Y328-143 [T]
9
24 “O” Ring
(1/8” x 2-5/8” o.d.)
(1) Y325-229 [B]
25 Check Stop (1) 94793 [DI]
26 Plunger Rod (1) 91552-1 [SH]
28 Seat (1) 90914 [SH]
30 Primer Rod (1) 91719 [SH]
31 Primer Plate (1) 93597-1 [SS]
32 Primer Button (1) 93596-1 [SS]
33 Lock Nut
(7/16” - 20)
(1) Y171-7-C [C]
34 Valve Rod (1) 90847 [SH]
36 Valve Seat Nut (1) 90912 [C]
9
37 Retaining Ring (1) Y147-102 [C]
43 Wave Spring (1) 94131 [SH]
9
47 Wave Spring (1) 90915 [SH]
9
51
“V” Packing
(66266-343-B, -R43-B)
(3) 93661-2 [GFT]
(66266-C43-B, -G43-B, -P43-B)
(3) 93661-4 [UH]
9
52
“V” Packing
(66266-343-B, -P43-B)
(2) 93661-2 [GFT]
(66266-C43-B, -R43-B)
(2) 93661-4 [UH]
(66266-G43-B)
(2) 93661-1 [L]
53 Male Packing Washer (1) 90839 [Br]
54 Female Packing Washer (1) 90910 [SS]
9
55
“V” Packing
(66266-343-B, -R43-B)
(2) 93662-2 [GFT]
(66266-C43-B, -G43-B, -P43-B)
(2) 93662-4 [UH]
9
56
“V” Packing
(66266-343-B, -R43-B)
(2) 93662-2 [GFT]
(66266-C43-B, -P43-B)
(2) 93662-4 [UH]
(66266-G43-B)
(2) 93662-1 [L]
57 Male Packing Washer (1) 90909 [SS]
9
65 “U” Cup (1) 90911 [GFT]
115 Backup (1) 94132 [D]
9
Items included in Service Kit
(see note
below)
637074-X43-B
(continued on page 4)
NOTE: The service kit includes (2) 91736 copper gaskets which are used on
models 66266-X43 (these models are prior to models 66266-X43-B). These
gaskets are used in place of the (2) Y328-143 “O” rings.
y
ARO® is a registered trademark of Ingersoll Rand Company
y
y
Loctite® and 242® are registered trademarks of Henkel Loctite Corporation
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