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TABLE OF CONTENTS
MATCO mfg
Wheels & Brakes
WE51 / WE51L
External Caliper
5" E - Series
Wheel and Brake
Technical Service Bulletin
REV F1 - 03/2021
SUBJECTS
A. WE51 Wheel & Brake Assembly
E. Assembly Diagram
F. Braking Lining Wear Limits
I.
K. Wheel Assembly Torque Values
O. Maximizing Brake Output
P. Lubricants
Q. Technical Assistance
DRAWINGS
E-1 Wheel & Brake Assembly Drawing
E-2 Caliper Housing Configurations
F-1 Brake Lining Wear Limits
G-1 Minimum Disc Wear
I-1 Tire Mounting Drawing
I-2 Tire Mounting Photo
L-1 Caliper Alignments
M-1 Pressure Bleeding Brake Schematic
M-2 Vacuum Bleeding Brake Schematic
O-2 Pedal Geometry
O-4 Pivot Connect Geometry
O-5 Heel Brake Geometry
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Summary of Contents for Matco 5 E Series
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Page 1: Table Of Contents
TABLE OF CONTENTS SUBJECTS PAGE A. WE51 Wheel & Brake Assembly MATCO mfg B. WE51 Parts List C. WE51L Parts List Wheels & Brakes D. WE51L.75 Parts List E. Assembly Diagram F. Braking Lining Wear Limits G. Brake Disc Inspection H. -
Page 2: We51L.75
The WE51 can be mounted on the same axle as the Cleveland 199- 102 K, by leaving the ¼ inch spacers on the axle. (No spacers are required when using the MATCO mfg Axle.) - 3 - - 4 -... -
Page 3: We51 Parts List
B. WE51 PARTS LIST / WHLBE5-1 C. WE51L PARTS LIST / WHLBE5-4 DWG # PART # DESCRIPTION DWG # PART # DESCRIPTION MSCAN4-16A HEX HEAD BOLT MSCAN4-16A HEX HEAD BOLT MSC4-4 BRASS RIVET MSC4-4 BRASS RIVET MSCAN960-416L WASHER MSCAN960-416 WASHER MSCNL1/4 NORDLOCK WASHER MSCNL1/4... -
Page 4: We51L.75 Parts List
D. WE51L.75 PARTS LIST / WHLBE5-8 E. BRAKE ASSEMBLY DRAWING BRAKE Fig E-1 DWG # PART # DESCRIPTION MSCAN4-16A BOLT MSC4-4 BRASS RIVET MSCNL1/4 NORDLOCK WASHER MSCAN960-416L WASHER WHLSBSE5 STATIONARY BRAKE SHOE WHLM66-106 LINING MSC4-6 BRASS RIVET WHLBPAE.75 BRAKE PLATE 1.13 WHLBSPE5 SPACER WHLMBSE5... - Page 5 SwiftLine Pad Replacement Program for the WE51 The Swiftline Pad Replacement program is designed to: • Simplify pad replacement on MATCO mfg brakes. • Eliminate the need to rivet linings, saving maint. & tooling. • Provide a 20 % discount on reline kits saving you money.
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Page 6: Brake Disc Inspection
G-1 Minimum Disc Wear G. BRAKE DISK INSPECTION “A” The MATCO mfg brake disk will give years of trouble free service under normal field conditions. Conditions such as unimproved fields, WHLD164-017 “A”=Minimum Thickness standing water, industrial pollution, or frequent use of the aircraft = 0.130 Min... -
Page 7: Mounting The Tire & Tube
I. MOUNTING THE TIRE & TUBE NOTE - MATCO mfg wheels are balanced at the factory and stamped with a chevron. The chevron should always be placed adjacent to and directly across from the valve hole. Verify alignment before mounting the tire. -
Page 8: We51 / We51L Wheel Assembly Instructions
THE 6. When using MATCO mfg bolt on axles, they can be shimmed for CONE MUST NOT ROTATE RELATIVE TO THE AXLE. The... -
Page 9: Caliper Alignment
The brake caliper must be positioned properly when assembled on system into the master cylinder. the axle. When using MATCO mfg. axle WHLA1A, the caliper alignment is assured because the bearing stops are machined into the 5. Air in the system will be pushed up and out in to the master axle. - Page 10 Fig M-1 Pressure Bleeding Brake Schematic Fig M-2 Vacuum Bleeding Brake Schematic - 19 - - 20 -...
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Page 11: Conditioning Procedures
ENERGY RATING 2. Perform 2-3 high-speed taxi snubs to generate 300-400 degrees at All MATCO mfg. brakes have two specified ratings. The first is the brake pads and rotor by accelerating the aircraft to 30-40 mph. energy rating which specifies the energy capacity of the brake. This... - Page 12 MC will be only for under performance of the brakes is low pressure. MATCO mfg. marginally increased because more rotation will result and cause a Brakes need 450 psi to achieve their rated torque.
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Page 13: Pedal Geometry
The systems common on light aircraft must be engineered to provide adequate pressure to the brakes to achieve the rated torque. MATCO mfg brakes require 450 psi to achieve the rated torque. The pedal geometry whether hand, toe, or heel operated, requires a mechanical advantage of at least 2.5 to 1. -
Page 14: Pedal Geometry
PEDAL GEOMETRY / MECHANICAL ADVANTAGE PEDAL GEOMETRY / HEEL BRAKES Fig O-3 Fig O-5 PEDAL GEOMETRY / PIVOT CONNECT Fig O-4 - 27 - - 28 -... - Page 15 It is only offered as assistance to you. MATCO mfg. will not be held responsible for any loss or damage as a result of our advice or information supplied.
- Page 16 NORD-LOCK Washers MY AIRCRAFT INFORMATION NORD-LOCK is a pair of washers with a wedge-locking action meeting DIN 25201 which is a unique method using tension instead of friction. The rise of the cams between the NORD-LOCK washers is greater than the pitch of the WHEEL INFORMATION bolt.
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