[Video] Reassemble and Lubricate 2146MAX Series

Question:

 

It is recommended that impact mechanism lubrication be performed after every 48 hours of actual tool run-time.

 

This article will provide instructions for service centers, distributors, and experienced customers on how to perform impact mechanism lubrication on the 2146MAX Air Impact Wrench.

 

Video Demonstration:

 

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Disassembly of the 2146 Series Air Impact Wrench

Answer:

2146MAX service manual [PDF DOWNLOAD] covers disassembly, reassembly, and impact mechanism lubrication.  More generalized air motor and tool maintenance guidance can be found here.

1.) Install the inlet pre-screen. Use a 5/16th hex wrench to install pre-screen. Tighten to snug.

– DO NOT OVER TIGHTEN

 

2.) Inspect inlet bushing o-ring for nicks or cuts.

 

3.) Order of installation of inlet parts kit: Throttle Spring, Throttle Valve, Valve Seat, Valve support, and Retainer

 

4.) Install the retainer. Place your finger over the opening as you install the retainer into the inlet bushing. The spring tension could easily launch parts over your work bench.

 

5.) Install the inlet bushing clip. Align the top of the clip to just under the inlet bushing o-ring and let it snap into place.

 

6.) Lubricate the o-ring with o-ring lube. Orientate the valve with tab downward. Rotate tab so it is towards the back of the handle. Insert and drop the valve into the handle opening.

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7.) Use a flathead screwdriver to gently rotate the valve back and forth as you press the valve into place.

 

8.) Install the reverse valve into the housing inlet until it just pops out into the motor area of the housing. The last little bit may take a “bump” as the o-rings travel over some internal edges. Just don’t push too hard that the top reverse valve o-ring starts to protrude out of the hole

 

9.) You must orientate the valve to install the REVERSE button first. ROTATE VALVE UNTIL THE TRAILING EDGE OF ITS TAB IS JUST PAST THE CENTER LINE OF THE TOOL BODY.

– POSITION SHOWN FOR INSTALLING THE REVERSE VALVE

 

10.) Lightly lubricate the forward and reverse buttons before installing.

 

11.) Install the reverse button. Insert button with its teeth orientated inward. Press Firmly downward on the reverse button. The button will snap into place

 

12.) Install the forward button. Insert the forward button with its teeth orientated inward. Press firmly downward on the button. The button will snap into place. Check for proper operation before proceeding. Pressing the forward and reverse buttons should operate smoothly in either direction.

 

13.) Install inlet bushing assembly. Align the ears of the inlet bushing assembly with the openings of
the tool’s handle. Press the tabs inward and insert assembly into the tool’s handle.

 

14.) Press the assembly into the handle until it clicks into place.

 

15.) Install Trigger assembly. Lightly lubricate the Trigger assembly o-ring and shaft. Orientate the assembly with the rounded edge of the trigger towards the bottom of the tool. Press into place. 

 

16.) Pictured below is the current state our different components should be in.

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17.) IMPORTANT: The integrated cylinder air gauge is calibrated at the factory.

– DO NOT ATTEMPT TO ADJUST AIR GAUGE

 

18.) Install vanes/blades. Inspect vanes for wear or damage. Replace vanes if necessary. Insert 6 vanes with the straight edge facing out. NOTE: It doesn’t matter which way the notches on the vane
(opposite the side of the straight edge), are orientated as they are inserted into the cylinder.

 

19.) Lubricate the cylinder. Use Ingersoll Rand Impact oil to lubricate the cylinder, cylinder wall, and vanes liberally.

 

20.) Install front endplate bearing. Carefully align bearing with the opening of the frontend plate.

 

21.) Install front endplate bearing. Use your thumbs to press equally on both sides of the outer bearing at the same time. Move your thumbs 90 degrees and repress to ensure bearing is
seated properly. NOTE: An arbor press may be needed to press the endplate
bearing fully into place.

 

22.) Install front Endplate assembly. Orientate the front endplate assembly with its ports facing
towards the cylinder inlet port. Slide the endplate over spline and onto the cylinder.

 

23.) Install 4 motor screws. Use a T-25 Torx bit to tighten the motor screws. Tighten in the sequence shown. Torque ranges from 2.8-3.2 Nm (25-28 IN-LBS),

 

24.) Install the power regulator. Before installing the power regulator assembly add 1/3 cc of #105
Ingersoll Rand grease to its détente position.

 

25,) Lubricate the o-rings with o-ring lube. Place tab on the power regulator into the highest position to the right side (as viewed from back of tool). Press firmly into place. Check for proper movement before continuing.

 

26,) Install motor gasket. Inspect the gasket for nicks or tears and replace if needed. Align the gasket with the figure of the cylinder and adjust into place.

 

27.) Install the motor assembly. Place the muffler material on top of the motor exhaust ports. Grasp the housing firmly in one hand with your other leverage both the motor and muffler components into the housing opening. Gently ease both into place.

 

28.) Assemble the hammer mechanism. Use Ingersoll Rand #105 to coat the hammer frame,

 

29.) Use Ingersoll Rand #105 to coat both hammers

 

30.) Use Ingersoll Rand #105 to fully envelop the jaw of the anvil approximately 15 ccs of grease,

 

31.) Install Hammers into the hammer frame. Reinstall the hammers in the same orientation you removed them. Hammers must be installed in opposite directions of each other NOTE: Markings were made at the time the hammers were removed for servicing

 

32.) Install hammer pins. Grease pins with Ingersoll Rand #105 grease. Insert pins into their openings and press downward.

 

33.) Install anvil. Insert the anvil into the hammer frame opening. Rotate the anvil back and forth until it sets completely inside the hammer frame.

 

34.) Install housing gasket. Orientate the gasket with ridge down and the bump towards the
trigger side of housing. Press into place..

 

35.) Install hammer mechanism kit onto the motor. Use Ingersoll Rand #105 grease to lightly lubricate the motor spline.

 

36.) Line up the motor’s spline with the teeth of the hammer frame. Rotate mechanism to check for proper movement.

 

37.) Install hammer case. Orientate the hammer case so that its grease fitting is to the right side of the tool (as if viewed from the back of the tool).

 

38.) Install 4 hammercase bolts. Tighten in sequence shown. Torque ranges from: 5.3 -5.9 N.m(47-52 IN-LBS).

 

39.) The 2146MAX should be assembled as shown below.