Operating and Safety Precautions

PARTS LIST

Item	Description (size)	Qty	Part No.	Mtl

1	Air Motor	(1)	65441-B

2	Spacer	(1)	96624	[Br]

3	Seal	(1)	96625	[U]

5	Spring	(1)	90120	[C]

6	Washer	(1)	90125	[Co]

7	“O” Ring (1/16” x 2-1/8” o.d.)	(1)	Y325-33	[B]

8	Nut (1/2” - 20)	(2)	Y11-108-C	[C]

9	Piston Rod	(1)	76507	[C]
10	Cup Follower	(1)	75678	[C]

11	Ball (1.0000” diameter)	(1)	Y16-232	[C]

12	Cup	(1)	92867-1	[UH]

13	Washer	(1)	75682	[C]
14	Inner Check Seat	(1)	75681	[C]

Item	Description (size)	Qty	Part No.	Mtl

15	Tube	(1)	76506	[C]

16	Ball Stop Pin (3/16” o.d. x 1-13/16”)	(1)	83009	[C]

17	“O” Ring (1/8” x 1-7/8” o.d.)	(1)	Y325-223	[B]

18	Ball (1.2500” diameter)	(1)	Y16-240	[C]

19	Foot Valve Seat	(1)	77006	[C]

20	Reducer (1-1/2 11-1/2 NPT x 2 - 11-1/2 NPT)	(1)	Y202-12	[I]


	Lower Pump Assembly (includes items	(1)	60873
	7 - 20)

	Items included in repair kit	(1)	61053

	Items included in packing kit	(1)	65823

WARNING HAZARDOUS PRESSURE. Do not exceed maxi- mum operating pressure of 1350 p.s.i. (93.1 bar) at 150 p.s.i. (10.3 bar) inlet air pressure.

Pump Ratio X	=	Maximum Pump
Inlet Pressure to Pump Motor		Fluid Pressure

Pump ratio is an expression of the relationship between the pump motor area and the lower pump end area. EXAMPLE: When 150 p.s.i. (10.3 bar) inlet pressure is supplied to the motor of a 4:1 ratio pump, it will develop a maximum of 600 p.s.i. (41.4 bar) fluid pressure (at no flow) - as the fluid control is opened, the flow rate will increase as the motor cycle rate increases to keep up with the demand.

WARNING Refer to general information sheet for additional safety precautions and important information.

The two-ball pumps are primarily designed for the pumping of medium viscosity fluids. The two-ball design provides better priming of the lower foot valve. The double acting feature is standard in all ARO industrial pumps. Material is delivered to the pump discharge outlet on both the up and down stroke.

NOTICE: Thermal expansion can occur when the fluid in the mate-

rial lines is exposed to elevated temperatures. Example: Material lines located in a non-insulated roof area can warm due to sunlight. Install a pressure relief valve in the pumping system.

Replacement warning label (pn 92325) is available upon re- quest.

LOWER PUMP END DISASSEMBLY

NOTE: All threads are right hand.

1.While holding pump securely with a strap wrench, unthread and remove (15) tube.

2.Loosen (8) nut against motor rod and unthread (9) piston rod from motor rod.

3.Unthread and remove (14) inner check seat, releasing (13) washer, (12) cup and (11) ball.

4.Loosen (8) nut to unthread and remove (10) cup follower from

(9) piston rod.

5.While holding (15) tube securely, unthread and remove (19) foot valve seat and components.

6.Remove (16) ball stop pin, releasing (18) ball.

LOWER PUMP END ASSEMBLY

NOTE: Thoroughly clean and lubricate all seals. Replace all soft

parts with new ones included in the repair kit. Note: Refer to the illustration (figure 2, page 3) for packing lip direction.

1. Assemble (17) “O” ring, (18) ball and (16) ball stop pin to (19)

foot valve seat.

2.Assemble (19) foot valve seat and components to (15) tube. NOTE: Tighten (19) foot valve seat to 125 - 150 ft lbs (169.5 - 203.4 Nm).

3.Assemble (9) piston rod and (8) nut to (10) cup follower. NOTE: Apply Loctite 242 to threads of (9) piston rod before assembly. NOTE: Tighten (8) nut to 50 - 60 ft lbs (67.8 - 81.3 Nm).

4.Assemble (12) cup, (13) washer and (11) ball to (10) cup fol- lower, securing with (14) inner check seat. NOTE: Tighten (14) inner check seat to 65 - 70 ft lbs (88.1 - 94.9 Nm).

5.Assemble (3) seal, (2) spacer, (5) spring and (6) washer into cav- ity in bottom of motor. NOTE: Refer to figure 2, page 3 for pack- ing lip direction.

6.Assemble (8) nut and (9) piston rod and components to motor rod, tightening (8) nut against motor rod. NOTE: Apply Loctite 242 to threads of (9) piston rod before assembly. NOTE: Tighten

(8) nut to 60 - 70 ft lbs (81.3 - 94.9 Nm).

7.Assemble (7) “O” ring to (15) tube and assemble (15) tube over (10) cup follower and components and into air motor base. NOTE: Tighten (15) tube to 90 - 100 ft lbs (122.0 - 135.6 Nm).

TROUBLE SHOOTING

Pump problems can occur in either the air motor section or the lower pump end section. Use these basic guidelines to help deter- mine which section is affected.

Pump will not cycle.

Be certain to first check for non-pump problems including kinked, restrictive or plugged inlet / outlet hose or dispensing device. Depressurize the pump system and clean out any ob- structions in the inlet / outlet material lines.

Refer to the motor manual for trouble shooting if the pump does not cycle and / or air leaks from the air motor. Inadequate air supply. Increase air pressure to the pump. Obstructed material line. Remove obstruction.

Damaged motor. Service the motor.

Material on one stroke only (fast downstroke).

Ball (18) is not seating. Remove the ball from the foot valve, clean and inspect the ball and foot valve seat area. If the ball or foot valve is damaged, replace.

Material on one stroke only (fast upstroke).

Cup (12) is worn. Replace.

Loctite® and 242® are registered trademarks of Henkel Loctite Corporation ARO® is a registered trademark of Ingersoll-Rand

Page 2 of 4

662420-B (en)

662420-B specifications

The Ingersoll-Rand 662420-B is a powerful and versatile tool, designed with the needs of professionals in mind. This pneumatic impact wrench is recognized for its sturdy construction, exceptional performance, and innovative technology that enhances its usability in various applications.

One of the main features of the Ingersoll-Rand 662420-B is its robust motor, which delivers an impressive amount of torque. This capability allows users to tackle heavy-duty jobs with ease, making it ideal for automotive repairs, industrial maintenance, and construction tasks. The tool provides up to 1,350 ft-lbs of breakaway torque, ensuring that it can handle even the most stubborn fasteners without difficulty.

The ergonomic design of the Ingersoll-Rand 662420-B is another significant characteristic. It has a lightweight body that reduces user fatigue, allowing for prolonged use without compromising comfort. The grip is designed for maximum control, providing a secure hold that enhances precision during operation. Additionally, the wrench features a 360-degree swivel air inlet, which minimizes hose tangling and improves maneuverability in tight spaces.

Ingersoll-Rand incorporates advanced technology in the 662420-B to boost its performance. The tool is equipped with a twin hammer mechanism, which delivers high torque with rapid impacts, increasing efficiency and productivity. This technology also reduces vibration, which is crucial for maintaining user comfort during extended use.

Durability is a hallmark of the Ingersoll-Rand brand, and the 662420-B is no exception. It is built with high-quality materials that withstand the rigors of demanding applications. The wrench is also designed for easy maintenance, featuring a simple oiling system that ensures optimal performance over time.

Moreover, the Ingersoll-Rand 662420-B includes a four-position power regulator that allows the user to adjust the speed and torque as needed, tailoring the tool's performance to the specific requirements of the task at hand. This feature adds versatility, making it an essential tool for professionals across different industries.

In summary, the Ingersoll-Rand 662420-B is an exceptional pneumatic impact wrench that combines power, durability, and user-friendly features. With its robust torque capabilities, ergonomic design, and innovative technology, it has become a favorite among professionals seeking reliability and performance in challenging work environments.

PARTS LIST