Ingersoll-Rand 8355A, 8255-A Motor Disassembly, Motor Assembly, AIR Piston Disassembly

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DISASSEMBLY/ASSEMBLY INSTRUCTIONS

Lubricate needle bearing (103) with ARO 33153 grease and as- semble to spindle (104) and assemble spindle to ring gear (102). Assemble seal (91) to lock nut (90) and assemble lock nut to ring gear, securing bearings and spindle.

Assemble spindle nut (92) to spindle.

Assemble gears (82) to spindle, securing with shafts (81). Assemble spacer (99) and bearing (70) to spindle, securing shafts.

Assemble gears (73 and 75) to spindle, securing with shafts

(72)and retaining ring (101). NOTE: Be sure each shaft con- tains 15 needle bearings.

Lubricate gears liberally with ARO 33153 grease and as- semble spindle to ring gear.

Assemble gearing to tool. Assemble chuck (117) to spindle.

MOTOR DISASSEMBLY

Remove gearing from tool as previously outlined. Remove spacer (88) and motor assembly from housing. Remove cap (54) and shield (55).

Grasp cylinder in one hand and tap splined end of rotor with a soft face hammer; motor will come apart.

MOTOR ASSEMBLY

Assemble bearing (56) to end plate (57), pressing on outer race of bearing.

Assemble end plate (57) to rotor, pressing on inner race of bearing.

Coat i.d. of cylinder (61) with ARO 29665 spindle oil and as- semble cylinder to end plate (57), aligning roll pin in cylinder with hole in end plate.

Coat blades (59 or 66) with ARO 29665 spindle oil and insert into rotor slots - straight side out.

Assemble bearing (63) to end plate (62), pressing on outer race of bearing.

Assemble end plate (62) to cylinder, pressing on inner race of bearing.

Be sure rotor does not bind (if rotor binds, tap splined end of rotor lightly to loosen).

Assemble shield (55) and cap (54) to end plate (57). Assemble motor and spacer (68) to motor housing. Assemble gearing to tool.

AIR PISTON DISASSEMBLY

Remove gearing and motor assembly as outlined.

Remove cover (1) adapter (3) washer (4) and trip bracket (5). Place valve housing in a suitable holding device with the outer sleeve in an upright position.

Using a strap wrench on outer sleeve (43), unthread (L.H. threads) and CAUTIOUSLY remove outer sleeve straight up and off from valve housing to prevent bending of air cylinder (37) and damaging the inside diameter.

Handle the air cylinder (37) with care so its fine cylindrical shape is not distorted in any manner.

If the air cylinder remains inside the outer sleeve when the sleeve is removed, push the piston rod (51) forward then pull it backward. The cylinder will then extend from the sleeve and can now be removed.

Remove “0”ring (33) and retaining ring (34).

Push piston rod and motor housing out thru gear end of outer sleeve. Piston (36) will drop out when motor housing and pis- ton rod are removed from outer sleeve.

Insert a suitable rod thru gear end of outer sleeve and push muffler cap (41) out thru valve end of outer sleeve.

Piston rod (51) and motor housing (52) are secured with a hard drying thread adhesive. If it should become necessary to sepa- rate these two parts, heat the threaded area lightly to soften the adhesive and unthread the rod from the housing (R.H. threads).

AIR PISTON ASSEMBLY

NOTICE: When a part containing “0” rings has been removed from the tool, it is recommended that the “0” rings be replaced with new ones when reassembling the part to the tool. Lubricate all “0”rings with ARO 36460 “0”ring lubricant.

Assemble retaining ring (38) “0”ring (39), “0”ring (40) and screen (42) to muffler cap (41).

Assemble muffler cap (41), screened end first, to outer sleeve

(43)from end of sleeve with internal threads. Push muffler cap into sleeve until it bottoms against step in sleeve.

Coat torque pin (44) with grease to retain pin in place and as- semble inside outer sleeve in hole provided.

Assemble “0”ring (50) to piston rod.

Assemble motor housing and piston rod to outer sleeve thru end of sleeve with external threads and push piston rod thru muffler cap, using care not to damage “0”ring (39) contained in muffler cap. Align slot in motor housing with torque pin (44). Assemble seals (35) to piston (36), with lips of seals facing away from each other.

Assemble piston (36) to piston rod (51) and push piston on rod until it seats against “0”ring (50) and step on rod. Assemble retaining ring (34) to groove in piston rod, securing piston on rod.

Assemble “0”ring (33) to piston rod and slide on rod until it seats against retaining ring (34).

Clamp valve housing (10) in a suitable holding device, with the threaded end of housing upright.

Coat i.d. of air cylinder (37) with “0”ring lubricant 36460 and place air cylinder on valve housing (10) over "0" ring (30). Using care not to damage “0”rings (11) contained in housing, insert piston rod (51) thru housing and carefully locate outer sleeve over air cylinder and thread sleeve to housing. Tighten securely using a strap wrench.

Assemble motor, gearing, trip bracket and components and assemble cover (1) to housing.

VALVE HOUSING DISASSEMBLY

The valve body (14), feed control valves (24) and button bleed valves (27) can be serviced without removing outer sleeve from valve housing. To gain access to check valves (17) and compo- nents or “0”rings (11), follow disassembly procedure for remov- ing the air piston.

Remove both caps (12) and “0”rings (13) - models 8255-A-( )

only.

Push valve body (14) out thru housing. Handle valve body with reasonable care so the o.d. of valve is not damaged. Button bleed valves (27) need not be removed except for re- placement.

VALVE HOUSING ASSEMBLY

Replace all “0”rings with new ones.

Lubricate “0”rings (15) with 36460 lubricant and assemble to valve body - models 8255-A-( ) only.

Assemble valve body to housing and assemble caps (12) with “0”rings (13), to housing.

If check valve(s) (17) have been removed, assemble “0" ring(s) (16) to valve(s) and assemble valve(s) to housing. Assemble spring(s) (18) to housing.

Assemble “0” ring (20) to screw plug (21) and assemble to housing.

Assemble screw plug (19) to housing - models 8255A-( ) only Assemble outer sleeve and components to housing as de- scribed in air piston assembly section.

Assemble “0”rings (23) to needle valves (24) and assemble needle valves to housing.

Assemble plate (25) to housing, securing with screws (26).

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Contents PAR-A-MATICSELF-FEEDDRILLS Recommended Power AIR Inlet System Refer to page 10 for plumbing and schematic diagramsFeed Rate Control Valves Manual OperationSET-UP Procedure with Optional Hydraulic Check M103 DISASSEMBLY/ASSEMBLY InstructionsGearing Disassembly Gearing Assembly To Control BreakthroughMotor Disassembly Motor AssemblyAIR Piston Disassembly AIR Piston Assembly41 RED 98 34009-1 Gearing Assy Gearing ASS’Y Gearing ASS’YAssemble with Thread Adhesive Such AS Loctite 79 33853-1 Gearing ASS’Y 24 26 IO0 Service Partnumberfor OrderingQTY Part NO. Description QTY Part NO. Description Number Models with -EU Suffix are EC Compliant ModelsBasic Remote Control for Start Emergency Retract Functions Model 8255ATrouble Shooting AccessoriesDimensional Data 8255-A-1 8255-A-2 8255-A3 8355A-1 8355-A-2 8355A-3

8355A, 8255-A specifications

Ingersoll-Rand is a renowned name in the field of industrial manufacturing, particularly known for its production of air compressors and related equipment. Among its notable offerings are the Ingersoll-Rand 8255-A and 8355A pneumatic compressors, which exemplify robust engineering and cutting-edge technology. These models are tailored for demanding applications, providing the reliability and performance that professionals in various industries require.

One of the standout features of the Ingersoll-Rand 8255-A and 8355A is their powerful performance capability. Both models are designed to deliver a high CFM (Cubic Feet per Minute) output, ensuring adequate airflow for even the most demanding tools and pneumatic devices. This makes them suitable for a range of applications, from automotive repair and manufacturing processes to construction and heavy-duty maintenance tasks.

The compressors are equipped with advanced rotary screw technology, known for its efficiency and silent operation. This technology enables the compressors to generate compressed air continuously, with less energy consumption than traditional piston compressors. The durability of the rotary screw design reduces wear and tear, leading to longer lifespans and lower maintenance costs.

Another significant feature is the inclusion of a sophisticated control system. This system allows users to monitor and adjust various parameters, such as pressure and temperature, enhancing operational efficiency. Additionally, the user-friendly interface simplifies the task of managing the compressor, ensuring that it can be operated with minimal training.

The 8255-A and 8355A models also prioritize safety and environmental considerations. They come with built-in safety features that prevent overloading and ensure stable operations, protecting both the equipment and the user. Furthermore, their environmentally friendly design aligns with contemporary sustainability goals, making them a responsible choice for modern enterprises.

In terms of mobility, both compressors are designed for ease of transport. They feature rugged frames and wheels, enabling them to be moved easily across job sites. This portability enhances their versatility, allowing for quick relocation as jobs change in scope and location.

In conclusion, the Ingersoll-Rand 8255-A and 8355A compressors stand out because of their powerful performance, innovative technologies, and essential safety features. They represent a blend of reliability and efficiency, making them invaluable assets in a variety of industrial and commercial applications.