These updates apply to the CB series of loaders. Please review the information as some of these modifications may already have been performed on your equipment. Feedback from our customer helps to drive many of these changes. 

Some customers have requested the loaders operate at a high cycle speed to increase production when two men are feeding cartridges. Please see "High Speed Operation" first, for the related modifications  and details. Your equipment will benefit from many of these modifications even if the higher production is not an issue.

 Are you seeing your loader double cycle occasionally? See "New Trigger"

Is your old CB 42 loader having trouble loading up holes with the larger cartridges? See "Air System Upgrade"

Service Note: 02/06/2002

Topic: Installation of New Red Flap O-ring TA824R & TA924R

Models Effected: TA 32 & 42, CB 32 & 42, TA 32R & 42R

Background: Increased loading pressure have resulted in flap o-rings coming out of their grooves. In addition difficulty in achieving a good seal between the flap and the o-ring due to irregularities of the grooves bottom surface. Regular cleaning of the groove can score the metal surface, a new o-ring will follow the contour creating a poor sealing surface at the flap contact area. Leakage of the discharge flap will cause the loader to cycle slowly, or the entry flap to not open at all.

Changes: The new (RED) o-ring material is softer than the black o-rings used previously. Better sealing is achieved as the material conforms to any surface irregularities. All flap o-rings must be glued into their groove with an instant adhesive. This procedure has been in place since 1999. THE RED O-RINGS REQUIRES AN INSTANT ADHESIVE PRIMER BEFORE THE GLUE IS APPLIED.

Materials:

• TS100 Primer
• TS200 Instant Adhesive
• #400 Wet / Dry Sand Paper / flat sanding block
• O-Ring Clamping Plate

Procedure: Remove the old o-ring and any glue from the groove. Particular attention must be paid to the bottom surface of the groove to ensure that it is clean and dry before proceeding.

Apply the primer by brush or spray to both the o-ring and the groove. Allow for the primer to dry. Apply a small circular bead of instant adhesive glue to the o-ring. Carefully locate the o-ring on top of the groove cavity, and press it into the groove by hand evenly so as not to cause localized distortion. Visually check for high points, then quickly install a clamping plate over the o-ring and firmly retain for 5-10 minutes. Remove the plate and allow the o-ring material to relax for 5-10 minutes. Install your flap with axle and spacers into the axle groove. Inspect the sealing surface between the flap and the o-ring. This is best accomplished by holding a bright light on one side of the flap and viewing the other side. No light should shine through. If there are high spots then give the o-ring a light sanding with the #400 grit sandpaper, and re-check with the light. This perfect seal is most important on the discharge flap, as any leakage will allow a constant flow of air into the chamber between the flaps. Thus the entry flap will be slow to open or not at all.

Service Note: 24/04/2002

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.

Service Note: 03/03/2002

Topic: TA100R Heavy Duty Spring Modification

Models Effected: CB32 & 42, CB 32R & 42R - Prior to S/N 2100

Units manufactured after April 2002 will have been updated.

Background: An Increase in the cycling speed of the loader can be achieved by replacing the standard TA 214R slide return spring, with the new TA100. The TA100 spring is 1-5/8" long compared to the shorter TA214R spring at 1-3/8" long. The shorter spring is better in applications were the mine supply pressure is lower ( below 75 PSI ). The longer TA100 spring requires a supply pressure above 75PSI with the air flowing down the hose.

Service Note: 24/04/2002

Topic: Exhaust Nipple Port Enlargement

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

Units manufactured after April 2002 will have been updated.

Background: Increase cycling speed of the loader can be achieved by drilling the exhaust port larger and adding a second port. This effectively reduces back pressure and allows the cartridge chamber to exhaust quicker.

Materials Required:

• 9/32" Drill Bit for Exhaust Nipple

Modifications:

 

The early blue valve blocks had a small brass breather (TA637). Later it was found that the cindered bronze filter could plug, slowing down the loader cycle speed. A small hole was drilled in these items which remedied this problem. If high speed cycling is required then remove this breather. All valve blocks after serial number 2010 now have just a drilled hole in the block with no threads for a breather.   

 

Service Note: 24B/04/2002

Topic: TA2011 Valve Block Modification

Models Effected: CB32 & 42, CB 32R & 42R Prior to S/N 2100

Units manufactured after April 2002 will have been updated.

Background: An Increase in the cycling speed of the loader can be achieved by drilling the exhaust port of the valve block larger. This modification will allow the air between the quick exhaust valve and the main valve to exhaust at a higher rate. Note that the brass breather TA 637 is no longer used, as it increases the back pressure and slows cycling.

Materials Required: 7/32" Drill Bit for Valve Body Exhaust Port

Modifications:

This modification may be done with the Main Valve TA201 on the loader.

Remove the following items:

• Cylinder Lid TA2051R
• Slide TA208
• Distance Cap TA206R
• Seal TA207R (red)
• Breather TA 637  

Drill the exhaust port larger with a 7/32" drill bit.

Remove any sharp burrs, or cuttings. Install the removed items, except the breather, which shall be discarded.

Service Note: 24C/04/2002

Topic: TA2051R Valve Cylinder Lid Modification

Models Effected: CB32 & 42, CB 32R & 42R Prior to S/N 2100

Units manufactured after April 2002 will have been updated.

Background: An Increase in the cycling speed of the loader can be achieved by drilling the exhaust port of the valve cylinder lid larger. This modification will increase the speed at which the slide return spring will force the slide into the cylinder lid.

Materials Required: # 70 Drill Bit for Valve cylinder Lid Exhaust Port Modification

Modifications:

This modification may be done with the Main Valve TA201 on the loader.

Remove the two screws that retain the cylinder lid. Watch for the small o-ring between the valve block and the cylinder lid. Drill out the exhaust port larger if required. Remove any burrs or cuttings. Reassemble as required.

Service Note: 01/02/2002

Topic: TA2051R Valve Cylinder Lid Modification: New Trigger TA862R

A change in the type of material and thickness was necessary. 

 

Topic: TA400 Air System Upgrade

Older CB42 series loader can benefit from our Air System Upgrade specially if you are loading up holes. This mod consists of increased pipe size from the original 3/8" to 1/2". This also includes the on/off ball valve. A new aluminum pilot air filter and plastic hose replace the old S/S unit. The plastic hose makes Valve removal much easier. The old "Y" strainer is also replaced with a spud style filter on the inlet to the air system.    

This does not apply to the "R" series loaders as all these series were supplied with this mod.

Material required when upgrading

Model CB32                                           ModelCB42

TA400 R    Kit                                       TA400R    Kit
GD32-1BR Bracket                                GD42-1BR Bracket