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Service Note 2002-4-24

Topic: High Speed Loading Capability

Models Effected: CB 32 & 42, CB 32R & 42R Prior to S/N 2100

Units manufactured after April 2002 will have all of these updates.

Background: Some customers required the loader to cycle extremely fast so that two men can feed cartridges into the loader. This type of operation requires a stable air source to reduce frequent adjustments to the button  setup. Flap breakage will also increase due to the higher impact. Some repair shop modifications must be performed to obtain this higher cycling speed.

Solution: Modifications to the loader to allow better pilot air venting, thus faster cycling of the slide in the valve body. Increasing the exhausting of the chamber air is also required.

Modifications: TA814R Exhaust Nipple ( Mod 2002- 4- 24A)

TA2011 Valve Block Drilling ( Mod 2002- 4- 24B)

TA2051R Cylinder Lid Drilling ( Mod 2002 - 4-24C)

TA100R HD Spring ( Mod 2002 – 3-03)

TA 862R Trigger Update ( Mod 2002 – 2-01)

TA637 Breather Removal ( Mod 2002 – 2-16)

Non " R " models only

TA400 Air Upgrade (Mod 2001-12-3)

Materials Required: 9/32" Drill Bit for Exhaust Nipple

7/32" Drill Bit for TA2011 Mod.

# 70 Drill Bit for TA 2051R Mod.

TA 100R HD Spring

TA 682R2 Trigger (available Feb 2002)

Procedure:

Follow directions as per the individual Mod sheets as stated above

e.g. (Mod 2002-4-24a) for the Exhaust Nipple.

Note 1: Proper Flap Sealing

Proper sealing of the flaps is of the utmost importance. Should the discharge flap have leakage and the entry flap is perfectly sealed the loader will operate slowly or not at all.

Note 2: Trigger / Button Adjustment

Standard trigger adjustment as per the operational manual calls for the button to be screwed into the valve block till the flow of air ceases from the cylinder lid bleed hole. An additional 1/8 to ¼ turn of the button allows for wear before re-adjustment is required.

High Speed Trigger Adjustment requires that the air be flowing down the Semi-conductive hose for this adjustment. Back out the button till the loader cycles (entry flap closes) then screw in the button till the flap opens. Some air may still be escaping from the cylinder lid bleed hole. Cycle the loader multiple times by depressing the button to ensure proper adjustment. This adjustment will require regular or daily maintenance. Changes in the mine supply pressure will effect the setting.