R0000204 Notching gear boxes assembly

Instructions for correct assembly of Notching gearboxes

Difficulté

Hard Difficile

Durée

1 hour(s) heure(s)

R0000204_Notching_gear_boxes_assembly_Screenshot_2023-05-17_165002.png

Introduction

For longevity and correct running , it is imperative these units are assembled to the correct tolerances and assembled in the way detailed by this procedure

Étape 1 - Q/C Bevel Gears

1 Supplied drive gears should be inspected for the following

• Evidence of damage to drive gear teeth, such as burrs or impact points.
• Cleanliness check. There should be no contaminants on the gears

Report any damage to gears through NCR system to log and retrieve replacement gears

Any rust/ surface contaminate should be removed with a wire brush

Étape 2 - Q/C Hardened parts

Drive shafts should be inspected for the following

1 Damage to indicated thread

2 Presence of burrs on roll pin hole

3 Contaminates from hardening

Damage to thread should be reported by NCR system and replacement sourced

Burrs should be removed by file

Contaminates should be removed with Scotch brite pad

Étape 3 - Degreasing of components

It is vital for correct function that all the shown components are thoroughly degreased before assembly .

To do this, wash all parts with FE10 solvent spray and dry with airline.

...Ensure your work area is very clean and free from Dust/swarf. Use a clean cloth or paper towel to lay on your bench to ensure parts remain clean once washed

Étape 4 - Assemble 1st bevel gear assembly

1 Check plate D0008158 for any number etching. If it is present it should always be assembled with the etching to be on the face shown

2 Mount plate over drive dog, and then press bearing onto shaft to encapsulate the plate. When the bearing is fitted the plate should still be free to move in the gap left

...Ensure correct bearing fit is present in all instances of bearings being fitted to shafts. Bearings should have resistance when pushed onto shaft. Bearings should NOT be very hard to push on. If bearings are loose on the shaft, bearing fit should be used to glue bearing in position. If bearings are hard to fit shaft should be polished to slightly reduce outer diameter and give the correct fit

Étape 5 - Fit key and spacer

Fit Spacer on top of bearing and then fit key to keyway on shaft

Étape 6 - Fit bevel gear and top bearing

1 Fit bevel gear onto assembly orientated as shown

2 Fit Bearing to top of shaft as indicated remembering to check fit of bearing

Étape 7 - Fit Castle nut

Castle nut will need fair tension to correctly hold the assembly together

It is best to hold the assembly in a vice to enable the nut to be tensioned correctly.

..Do not clamp the assembly straight into a vice to hold it.

Use 2 m5 x 70 cap head screws and 2 m5 nuts

Screw the bolts into the two holes shown and lock off the two m5 nuts to strengthen the the two temporary mounting points

Clamp the two m5 bolt shanks in the vice to avoid damage to the assembly

Use loctite 243 on castle nut and use correct castle nut spanner to tension.

Ensure castle nut is fitted in the orientation shown. Larger flat face should facing outwards, smaller face should contact bearing

Étape 8 - Fit 1st bevel gear assembly to housing

...Due to the nature of the construction, it is imperative to use bearing fit to mount completed assembles into the gearbox. This is due to the fact the bore tolerances are slightly larger than usual to allow slid fit of assemblies for setting. If bearing fit is not used the bearings will eventually spin in the bores when operating and cause premature gearbox failure

1 Add 3 match head sized drops of bearing fit to indicated bore and smear around

2 Add 3 match head sized drops of bearing fit to indicated bore and smear around

3 Insert by hand 1st bevel gear assembly into bore, there should be slight resistance but no more pressure than hand pressure should be required. 4 Ensure assembly is pushed fully in then captivate with 6 off m3x10 cap head bolts with no washers with loctite 243. Once tight pen mark bolts to shown completed

Étape 9 - Check rotation of assembly.

Once all fitted rotation of assembly in housing should be checked . Rotation should be smooth and consistent with no high spots or lumps

Étape 10 - 2nd Bevel gear assembly

1 Press bearing one onto shaft. If fit of bearing is loose this will need bearing fit at a later stage

2 Fit drive dog spacer and 2nd bearing again noting the fit of the bearing on the shaft

3 Fit bevel gear orientated as picture and align 4mm hole through gear and shaft

4 Use a 4mm x 26mm spiral pin to fix bevel gear to drive shaft

...Do Not clamp assembly in vice when fitting the spiral pin. Damage can be caused to components and cause assembly issues. It is best to hold the assembly steady with your hand and drive the pin in , using a drift to centralise the roll pin

Étape 11 - Checking and adjusting drive dog spacer

1 Spacer should be able to move in the directions shown, but it must have resistance, such as it wont fall under its own weight .

2 If the spacer is to tight, the drive dog spacer will need reducing in size slightly to correct the fit. To do this, disassemble the parts by removing the spiral pin, bevel gear and first bearing and releasing the drive dog spacer.

3 With a 240 grit sanding pad on a flat surface, use circular motions to lightly relief the face indicated by a minute amount. Repeat on both sides. Remember to only take a small amount of, generally 4 rotations will suffice for safe adjustment

4 Reassemble and check fit of spacer. If its still to tight, repeat above step

5 If the spacer is to loose, the spiral pin may have distorted on assembly. To adjust in this instance, the following is required. Use the press and place the assembly vertically , and using the press apply pressure in the direction shown to help centralise the roll pin

6 If the bearings do not require bearing fit, move to next step. If bearing fit was loose, disassemble components and reassemble with smears of bearing fit for bearings

Étape 12 - Checking gear alignment of 1st and 2nd bevel gear assemble

Before final assemble the fit of the bevel gears needs checking .To do this the following should be followed.

1 Slide the second bevel assembly into the housing in the direction shown. This assembly should be a snug slide fit into the housing . Push the assembly in until it bottoms out on the 1st installed bevel gear.

2 Rotate blade mounting face to adjust the bevel gears to a zero backlash position

3 Use a M8 x 12 flat bottomed grubscrew in the indicated hole then gently apply pressure and hold the 2nd bevel gear in place.

Étape 13 -

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