2017 Guide RS & R
GEN.0000000005240 Rev A
© 2017 SRAM, LLC
service
manual
2
SRAM® LLC WARRANTY
EXTENT OF LIMITED WARRANTY
Except as otherwise set forth herein, SRAM warrants its products to be free from defects in materials or workmanship for a period of two years after
original purchase. This warranty only applies to the original owner and is not transferable. Claims under this warranty must be made through the
retailer where the bicycle or the SRAM component was purchased. Original proof of purchase is required. Except as described herein, SRAM makes
no other warranties, guaranties, or representations of any type (express or implied), and all warranties (including any implied warranties of
reasonable care, merchantibility, or fitness for a particular purpose) are hereby disclaimed.
LOCAL LAW
This warranty statement gives the customer specific legal rights. The customer may also have other rights which vary from state to state (USA), from
province to province (Canada), and from country to country elsewhere in the world.
To the extent that this warranty statement is inconsistent with the local law, this warranty shall be deemed modified to be consistent with such law,
under such local law, certain disclaimers and limitations of this warranty statement may apply to the customer. For example, some states in the United
States of America, as well as some governments outside of the United States (including provinces in Canada) may:
a. Preclude the disclaimers and limitations of this warranty statement from limiting the statutory rights of the consumer
(e.g. United Kingdom).
b. Otherwise restrict the ability of a manufacturer to enforce such disclaimers or limitations.
For Australian customers:
This SRAM limited warranty is provided in Australia by SRAM LLC, 1000 W. Fulton Market, 4th Floor, Chicago, IL, 60607, USA. To make a warranty claim
please contact the retailer from whom you purchased this SRAM product. Alternatively, you may make a claim by contacting SRAM Australia, 6 Marco
Court, Rowville 3178, Australia. For valid claims SRAM will, at its option, either repair or replace your SRAM product. Any expenses incurred in making
the warranty claim are your responsibility. The benefits given by this warranty are additional to other rights and remedies that you may have under
laws relating to our products. Our goods come with guarantees that cannot be excluded under the Australian Consumer Law. You are entitled to a
replacement or refund for a major failure and for compensation for any other reasonably foreseeable loss or damage. You are also entitled to have
the goods repaired or replaced if the goods fail to be of acceptable quality and the failure does not amount to a major failure.
LIMITATIONS OF LIABILITY
To the extent allowed by local law, except for the obligations specifically set forth in this warranty statement, in no event shall SRAM or its third party
suppliers be liable for direct, indirect, special, incidental, or consequential damages.
LIMITATIONS OF WARRANTY
This warranty does not apply to products that have been incorrectly installed and/or adjusted according to the respective SRAM user manual. The
SRAM user manuals can be found online at sram.com, rockshox.com, avidbike.com, truvativ.com, or zipp.com.
This warranty does not apply to damage to the product caused by a crash, impact, abuse of the product, non-compliance with manufacturers
specifications of usage or any other circumstances in which the product has been subjected to forces or loads beyond its design.
This warranty does not apply when the product has been modified, including, but not limited to any attempt to open or repair any electronic and
electronic related components, including the motor, controller, battery packs, wiring harnesses, switches, and chargers.
This warranty does not apply when the serial number or production code has been deliberately altered, defaced or removed.
This warranty does not apply to normal wear and tear. Wear and tear parts are subject to damage as a result of normal use, failure to service
according to SRAM recommendations and/or riding or installation in conditions or applications other than recommended.
Wear and tear parts are identified as:
• Dust seals
• Bushings
• Air sealing o-rings
• Glide rings
• Rubber moving parts
• Foam rings
• Rear shock mounting hardware
and main seals
• Upper tubes (stanchions)
• Stripped threads/bolts (aluminium,
titanium, magnesium or steel)
• Brake sleeves
• Brake pads
• Chains
• Sprockets
• Cassettes
• Shifter and brake cables (inner
and outer)
• Handlebar grips
• Shifter grips
• Jockey wheels
• Disc brake rotors
• Wheel braking surfaces
• Bottomout pads
• Bearings
• Bearing races
• Pawls
• Transmission gears
• Spokes
• Free hubs
• Aero bar pads
• Corrosion
• Tools
• Motors
• Batteries
Notwithstanding anything else set forth herein, the battery pack and charger warranty does not include damage from power surges, use of improper
charger, improper maintenance, or such other misuse.
This warranty shall not cover damages caused by the use of parts of dierent manufacturers.
This warranty shall not cover damages caused by the use of parts that are not compatible, suitable and/or authorised by SRAM for use with SRAM
components.
This warranty shall not cover damages resulting from commercial (rental) use.
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TABLE OF CONTENTS
BRAKE SERVICE OVERVIEW .............................................................................................................................................................................5
TROUBLESHOOTING ......................................................................................................................................................................................................................................6
CALIPER SERVICE ...............................................................................................................................................................................................7
PARTS AND TOOLS NEEDED FOR SERVICE...........................................................................................................................................................................................7
CALIPER EXPLODED VIEW ........................................................................................................................................................................................................................... 7
CALIPER BRAKE PAD REMOVAL .................................................................................................................................................................................................................8
CALIPER PISTON REMOVAL .........................................................................................................................................................................................................................9
CALIPER PISTON INSTALLATION ............................................................................................................................................................................................................. 12
LEVER SERVICE .................................................................................................................................................................................................15
PARTS AND TOOLS NEEDED FOR SERVICE.........................................................................................................................................................................................15
GUIDE RS LEVER EXPLODED VIEW ......................................................................................................................................................................................................... 15
GUIDE R LEVER EXPLODED VIEW ........................................................................................................................................................................................................... 16
LEVER BLADE REMOVAL............................................................................................................................................................................................................................. 17
PISTON ASSEMBLY REMOVAL ................................................................................................................................................................................................................. 20
PISTON ASSEMBLY INSTALLATION ........................................................................................................................................................................................................22
RS LEVER BLADE INSTALLATION ............................................................................................................................................................................................................ 23
R LEVER BLADE INSTALLATION .............................................................................................................................................................................................................. 27
SAFETY FIRST!
We care about YOU. Please, always wear your safety glasses and
protective gloves when servicing SRAM® products.
Protect yourself! Wear your safety gear!
5
Brake Service Overview
SRAM® brake systems need to be serviced periodically to optimize braking function. If brake fluid is leaking from any area of the brake there may be
damage or wear and tear to the internal moving parts. If the system has been contaminated with the wrong fluid there may be damage to all rubber
and plastic internal parts. If your brake was damaged in a crash there may be damage to the lever blade, pushrod, and housing assemblies. Inspect
and replace these parts to restore proper brake function.
Your product's appearance may differ from the pictures contained in this publication.
SAFETY INSTRUCTIONS
• Servicing your brakes removes all of the brake fluid from the system. You must bleed your brakes after you service the brake caliper.
• Always wear safety glasses and nitrile gloves when working with DOT fluid.
• Place an oil pan on the floor where you will be working on the brake.
• Used DOT fluid should be recycled or disposed of in accordance to local and federal regulations.
• Never pour DOT fluid down a sewage or drainage system or into the ground or a body of water.
• DOT fluids will damage painted surfaces. If any fluid comes in contact with a painted surface (e.g. your frame) or printing on the brakes, wipe it off
immediately and clean it with isopropyl alcohol or water. Damage to painted and/or printed surfaces by DOT fluid is not covered under warranty.
• Do not allow any brake fluid to come in contact with the brake pads. If this occurs, the pads are contaminated and must be replaced.
• For best results, use only SRAM High-Performance DOT 5.1 brake fluid. If SRAM brake fluid is not available, only use DOT 5.1 or 4 brake fluid.
• Do not use mineral oil or DOT 5 fluid.
NOTICE
SRAM Guide Brakes are a unique product. The Guide caliper must be serviced before the lever. The lever must be connected to the caliper and
the brakes must still have fluid in them in order to advance the pistons and service the caliper. Once the lever has been disconnected and the fluid
drained it is not possible to advance the pistons.
6Troubleshooting
Troubleshooting
'Sticky' or slow brake pad return and/or excessive lever throw
If your brakes feel sticky and exhibit slow brake pad return and/or excessive brake lever throw, it may be a result of the pistons sticking in the caliper.
Before completely disassembling your caliper, you can try to loosen the sticky piston by performing the following steps:
1. Clamp the bicycle into a bicycle work stand.
2. Remove the wheel from the affected caliper.
3. Squeeze the brake lever several times until the brake pads nearly contact one another.
4. Insert the Guide pad spreader between the brake pads to spread the pads to the full width of the clip.
5. Remove the Guide pad spreader.
6. Repeat steps 3-5.
7. Reinstall the wheel.
8. Squeeze the brake lever several times to position the brake pads to the proper distance from the rotor.
9. Center the caliper on the rotor if necessary.
10. Spin the wheel and check the brake function. The pistons should move freely and there should not be excessive brake lever throw.
If there is no improvement in the brake function, proceed with caliper service.
7Caliper Service
C aliper Exploded View
Caliper Service
We recommend that you have your SRAM® Guide™ Brakes serviced by a qualified bicycle mechanic. Servicing SRAM brakes requires knowledge of
brake components as well as the special tools and fluids used for service.
For exploded diagram and part number information, please refer to the Spare Parts Catalog available on our website at
sram.com/service. For order information, please contact your local SRAM distributor or dealer.
Information contained in this publication is subject to change at any time without prior notice. For the latest technical information, please visit our
website at sram.com/service.
Your product's appearance may dier from the pictures contained in this publication
P arts and Tools Needed for Service
Parts
• SRAM Guide Brake Pad Kit
• Caliper Piston Kit
Safety and Protection Supplies
• Safety glasses
• Nitrile gloves
• Oil pan
• Clean, lint-free rag
SRAM Tools
• SRAM Brake Bleed Kit (includes: Guide Bleed Block and Bleeding
Edge™ Fitting)
• Pad Spreader Tool (1.8 mm)- Guide/Trail Caliper
Common Tools
• 2.5 mm hex wrench
• Needle nose pliers
• Pick with a 90 degree bent tip
• T25 TORX® wrench
• T25 TORX bit socket
• Torque wrench
• Digital caliper
Lubricants and Fluids
• Isopropyl alcohol
• SRAM High-Performance DOT 5.1 fluid. If SRAM fluid is not
available, only use DOT 5.1 or 4 fluid.
• SRAM or AVID DOT grease. If SRAM or AVID DOT grease is not
available only use a DOT compatible grease.
E-clip
Banjo
fitting
Banjo
bolt
Caliper body
bolt
Caliper o-ring
Caliper
o-ring
Pad retention bolt
Inboard caliper body
Outboard caliper
body
Caliper pistons
Caliper pistons
Piston seals
Piston seals
Brake pads
Pad H-Spring
Bleed screw port
Caliper body
bolt
Heat
shield
Guide Pad Spreader
Banjo
8Caliper Brake Pad Removal
Caliper Brake Pad Removal
NOTICE
Brake pads must be replaced if the total thickness of the backing plate and pad friction material is less than 3 mm.
Use a T25 TORX® wrench to remove the brake caliper from the fork or
frame.
Remove the caliper mounting bracket and hardware from the caliper
then set them aside in the order that they were removed.
Remove the E-clip from the pad retention bolt.
Remove the pad retention bolt from the caliper.
Remove the brake pads and pad H-spring from the caliper.
1
2
Needle nose pliers 20 mm or 15 mm Thru Axle
2.5 mm hex wrench QR
3
Digital Caliper
2.7-3.2 N•m (24-28 in-lb) 22 mm
9Caliper Piston Removal
Caliper Piston Removal
NOTICE
DOT fluid will damage painted surfaces. If any fluid comes in contact with a painted surface (e.g your frame) or printing on the brakes, wipe it off
immediately and clean it with isopropyl alcohol or water. Damage to painted and/or printed surfaces by DOT fluid is not covered under warranty.
Install the pad retention bolt.
Insert the Guide™ pad spreader so that it snaps onto the pad retention
bolt.
Squeeze the brake lever to advance the pistons until they contact the
pad spreader.
Remove the banjo bolt.
1
2.5 mm hex wrench 20 mm or 15 mm Thru Axle
2
3
T25 TORX wrench Rubber-tipped blow gun chuck nozzle 22 mm
10Caliper Piston Removal
Remove the Guide™ pad spreader.
Remove the pad retention bolt.
Remove each caliper body bolt.
Separate the caliper body halves.
Set the heat shield aside.
Remove the caliper o-ring from the outboard side of the caliper.
4
2.5 mm hex wrench QR
5
T25 TORX wrench Rubber-tipped blow gun chuck nozzle 22 mm
6
7
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