J P Langston Brake Retrofit A detailed walkthrough

J. P. Langston Brake Retrofit A detailed walkthrough of how Montalvo upgrades the capabilities of your Langston machine with a retrofit to Montalvo V Brakes

Langston Automotive Style Brakes and Langston Unwind Stands

First, verify your Langston machine number. When ordering a Langston retrofit package your machine number is used to match brake bolt patterns and shaft types.

After receiving your V Brake(s), verify contents. V 300 Series brake spider assembly Air Input V 308 V Brake Piston Air Fittings & (Ø 1/4”) Piping V Pistons & V Pads

To begin installation, attach fan cover mounting clips (3) to the back side of the spider plate. Mounting clips

Attach cover clips with supplied SHCS & Washers. Verify that the edge of the clip does not protrude past the edge of the spider plate before tightening. You can use your finger to verify that the edge of the clip is flush with the spider. Edge of spider Edge of clip

Additional brake package components V 300 Series Fan Cover Hub & Spacer Brake with single air input Mounting Studs – V 300 Series 1/2 -13 UNC Hex Nuts, (3) per stud 1/2 -13 UNC Studs, (4) per

J. P. Langston Brake Input air line J P Langston friction module J P Langston brake rotor

Uninstall your Langston brake by loosening the set screws and removing the friction module mounting pins to remove the friction module assembly. Mounting pins Set screws J P Langston friction module

Pull out the 4 friction module mounting pins. Friction module mounting pin

Remove the 3 M 12 SHCS from rotor hub using 10 mm allen wrench.

Save all shims for use with the new brake. Check inside rotor hub and on the shaft end for additional shims

It is essential that all Shims are kept at their original position for use with your new V Brake. Remove all grease and dirt from the shims Damaged or broken shims should be replaced with new ones of equal thickness

After rotor hub is removed use an allen wrench to remove mounting plate bolts.

Carefully pull the mounting plate from the spindle arm without allowing the shaft/core chuck to drop back from the side.

Clean grease and dirt from the mounting plate. Grease seal

Mark the mounting plate to identify the unwind position. Unwind Position

Prepare to remove and replace shaft seal, and then install new seals from mounting plate backside. Prepared mounting plate Mounting Plate Shoulder Seal

Before installing seal into mounting plate, check that the ‘seal lip spring’ has not popped out. Seal Lip Spring Seal

Install new seal using Federal-Mogul P/N 417269 4. 875 x 6. 250 x 0. 500.

The next step is to mark the Mounting Plate Hole locations using the Montalvo Supplied Drill Jig

Place the drill jig over the mounting plate and align the jig so that the ‘flat’ on the jig indexes to the ‘flat’ on the mounting plate. Flat Index Seal Index New Seal Flat Index Drill Bushings Flat Index Counterbor ed Side

Check to ensure each location to be punched is clear of existing mounting plate holes. Remove jig and verify that punched locations clear mounting plate holes. Ø 1/4” Center Punch (4) Locations Verified locations

Next, set up milling machine Set machine for drilling and tapping 1/2 -13 UNC holes, and drill holes for mounting studs (4 per plate).

Drill 27/64 Diameter (0. 4219) thru (4) places Note that thru holes are not close to existing mounting plate holes.

Clamp mounting plate to work surface and tap 1/2 -13 UNC thru (4) places 1/2 -13 UNC tap, (4) places

Replace mounting plate/seal assembly and tighten bolts

Insert spacer

Insert shims into new brake hub and align with clearance holes Montalvo brake hub Shims saved from old brake

Place hub at shaft end and hold M 12 SHCS bolts in place at hub counter bore

Insert and tighten 3 M 12 x 45 SHCS bolts thru hub and spacer into shaft Note: Apply Pressure To The Back Side Of The Shaft While Tightening Bolts

Check shaft for rotation and axial movement New seal may make rotation stiff until broken in. New grease seal Spacer Predrilled mounting plate Hub

Install 4 1/2 -13 UNC Studs with hex nut into mounting plate Wait to tighten the hex nuts until after the brake has been put on. Visually insure stud end is behind hub shoulder Hub shoulder 3/4” to 1” thread into plate

Thread a second 1/2 -13 UNC nut on each stud before attaching the spider, and then slide Spider Assembly over the studs. Second set Of 1/2 -13 UNC hex nuts installed behind spider assembly

Thread another 4 1/2 -13 UNC hex nuts onto the stud ends to hold the spider in place Make sure the friction pads are facing out. Friction pad Piston assembly 1/2 -13 hex nut

Attach disc brake to hub over the index shoulder using 6 M 8 x 35 SHCS Montalvo V 300 Brake Disc

Tighten the 1/2 -13 UNC hex nuts to the mounting plate. Hex nuts on either side of spider assembly Be sure that stud does not contact brake disc

Adjust hex nuts until there is approximately 1/16” gap between friction pads and brake disc 1/16” gap Adjust hex nut

Check pad-disc gap with 1/16” shim and tighten out hex nut where necessary Verify 1/16” gap all of the way around the disc Outer hex nut

Run a power cable for the fan cover and replace the air input line with a Ø ¼” hose

Push Ø ¼” input air line through cover into push lock fitting Push lock fitting Brake cover

Assembled V-308 Brake with fan cover Power to fan Air input to brake Ø 1/4” diameter air line Fan power from control arm

Run the fan power from each control arm Note the air and power input orientation relative to the pick-up arm. Air and Power inputs

Done. Langston Model 380 Corrugator With Montalvo V 308 Brakes

Installation Overview After removing old brake assembly: • Remember To Keep Old Shims At Each Unwind Stand • It Is Essential That All Shims Are Kept At Their Original Position For Use With The New Brake • Remove Mounting Plate • Install New Seal In Mounting Plate • Use Drill Jig To Align Mounting Holes • Use Punch To Mark (4) Locations • Drill (4) Holes For Mounting Studs • Tap Holes For 1/2 -13 UNC • Replace Mounting Plate • Insert Spacer • Mount New Brake Hub With Old Shims • Tighten Hub While Supporting Shaft • Thread (4) Studs With Nuts Into Mounting Plate • Slide V 308 Spider Assembly Over Mounting Studs • Attach Brake Disc To Hub Using (6) M 8 x 35 SHCS • Verify That Stud Does Not Contact Brake Rotor • Adjust For 1/16” Gap Around The Brake Assembly