Difference between revisions of "External Maintenance"

From The Bike Kitchen
Jump to: navigation, search
Line 3: Line 3:
 
Class enrollment is managed using Brown Paper Tickets.
 
Class enrollment is managed using Brown Paper Tickets.
  
TODO: provide more information on managing the enrollment process.
+
See [[BrownpaperTickets Instructions]] for details on setting up and managing class enrollment.
  
 
=Curriculum=
 
=Curriculum=
Line 10: Line 10:
  
 
Bicycle Anatomy
 
Bicycle Anatomy
- Frame tubes
+
* Frame tubes
- Components
+
* Components
- Brief quiz
+
* Brief quiz
  
 
===Basic Chain Maintenance===
 
===Basic Chain Maintenance===
  
 
Types of Lubricants
 
Types of Lubricants
- Dry vs. Wet; describe, compare
+
* Dry vs. Wet; describe, compare
- Different types of dry: teflon, parafin, silicon, plastic
+
* Different types of dry: teflon, parafin, silicon, plastic
- Wet on dry ok; dry on wet not ok
+
* Wet on dry ok; dry on wet not ok
  
 
Lubricating vs. Cleaning
 
Lubricating vs. Cleaning
- How often, how do you know when
+
* How often, how do you know when
- Basic lubrication; keep it slightly glistening
+
* Basic lubrication; keep it slightly glistening
- Light cleaning; rinse the dirt out w/ lube
+
* Light cleaning; rinse the dirt out w/ lube
- Remove, soak and scrub
+
* Remove, soak and scrub
- Remove all solvent before lubricating
+
* Remove all solvent before lubricating
  
 
===Flat Repair===
 
===Flat Repair===
  
 
Tire/Rim Anatomy
 
Tire/Rim Anatomy
- Bead; materials
+
* Bead; materials
- Rim hook
+
* Rim hook
- Engagement
+
* Engagement
  
 
Types of Valves
 
Types of Valves
- Identification
+
* Identification
- Operation
+
* Operation
- Rim compatibility; adapter gasket
+
* Rim compatibility; adapter gasket
- Pump compatibility
+
* Pump compatibility
  
 
Removing Wheel
 
Removing Wheel
- Open brake
+
* Open brake
- Proper gear; reasons
+
* Proper gear; reasons
  
 
Removing Tire
 
Removing Tire
- Use of levers
+
* Use of levers
- User of hands
+
* User of hands
- Stubborn tire tricks
+
* Stubborn tire tricks
- Avoid puncture
+
* Avoid puncture
- Don't user metal levers
+
* Don't user metal levers
  
 
Finding the Leak
 
Finding the Leak
- Types of flats
+
* Types of flats
- Relative orientation of tire/tube
+
* Relative orientation of tire/tube
- Finding leak; circle it
+
* Finding leak; circle it
- Checking tire
+
* Checking tire
  
 
Patching
 
Patching
- Types of patches ; glue-on, self-adhesive
+
* Types of patches ; glue-on, self-adhesive
- Vulcanization reaction
+
* Vulcanization reaction
- Prepping tube, applying glue
+
* Prepping tube, applying glue
- Applying patch
+
* Applying patch
  
 
Re-assembly
 
Re-assembly
- Installing tire
+
* Installing tire
- Inflation steps; proper seating
+
* Inflation steps; proper seating
- Installing wheel on bike
+
* Installing wheel on bike
  
 
==Day 2 : Gears==
 
==Day 2 : Gears==
Line 74: Line 74:
  
 
Chain Wear
 
Chain Wear
- Indicator tool
+
* Indicator tool
- Stretch
+
* Stretch
- Cog wear, chain rings
+
* Cog wear, chain rings
- Behavior/interaction of worn parts; skipping, stiff link
+
* Behavior/interaction of worn parts; skipping, stiff link
  
 
Chain Anatomy
 
Chain Anatomy
- Plates; inner, outer
+
* Plates; inner, outer
- Pin; flanged ends
+
* Pin; flanged ends
- "Link"; actually 2 segments
+
* "Link"; actually 2 segments
- Sizes; road, 10spd, BMX/Track
+
* Sizes; road, 10spd, BMX/Track
  
 
Chain Breaker
 
Chain Breaker
- Basic Principle; small vice
+
* Basic Principle; small vice
- Different sizes; road/10spd, BMX/Track
+
* Different sizes; road/10spd, BMX/Track
- Difference between upper and lower slots; upper spreads chain, lower compresses chain
+
* Difference between upper and lower slots; upper spreads chain, lower compresses chain
- Don't push the pin out!
+
* Don't push the pin out!
- Breaking - one step; joining - 2 steps
+
* Breaking* one step; joining* 2 steps
- How to tell when it's correct
+
* How to tell when it's correct
  
 
===Gears===
 
===Gears===
  
 
Cable Principles
 
Cable Principles
- Tension/Compression
+
* Tension/Compression
- Barrel Adjusters; 'loosening' the adjuster means 'tightening' the cable; start in the middle
+
* Barrel Adjusters; 'loosening' the adjuster means 'tightening' the cable; start in the middle
  
 
Shifting Principles
 
Shifting Principles
- Friction vs. Index
+
* Friction vs. Index
- Backlash and Overshift
+
* Backlash and Overshift
- Indixing is in the shifter, not the deraileur
+
* Indixing is in the shifter, not the deraileur
- Standards, manufacturers and inter-compatibility; GripShift
+
* Standards, manufacturers and inter-compatibility; GripShift
  
 
Deraileur Anatomy
 
Deraileur Anatomy
- Parallelogram, cage, pulleys
+
* Parallelogram, cage, pulleys
- Wrap Adjust Screw; keeps jockey pulley from hitting large cog
+
* Wrap Adjust Screw; keeps jockey pulley from hitting large cog
- Limit Screws; demonstrate functionality
+
* Limit Screws; demonstrate functionality
- Compare to front; position on seat tube
+
* Compare to front; position on seat tube
  
 
Exercise
 
Exercise
- Shift out of smallest chain ring
+
* Shift out of smallest chain ring
- Disconnect cable, put all screws/barrel adjusters out of position
+
* Disconnect cable, put all screws/barrel adjusters out of position
- Adjust screws first; just a bit wider than perfect to allow for overshift
+
* Adjust screws first; just a bit wider than perfect to allow for overshift
- Connect cable and adjust tension
+
* Connect cable and adjust tension
- Adjust for other chain rings
+
* Adjust for other chain rings
  
 
Shifting Technique (time permitting)
 
Shifting Technique (time permitting)
- Cross gearing
+
* Cross gearing
- Reduce load; timing w/in pedal stroke
+
* Reduce load; timing w/in pedal stroke
- Shift when decelerating
+
* Shift when decelerating
- Shift before hills
+
* Shift before hills
  
  
Line 128: Line 128:
  
 
Cables/Housing Types
 
Cables/Housing Types
- Cable sizes, ends
+
* Cable sizes, ends
- Housing sizes
+
* Housing sizes
- Housing construction, brake vs. deraileur
+
* Housing construction, brake vs. deraileur
- Housing failure modes; why shifter is unsafe for brakes
+
* Housing failure modes; why shifter is unsafe for brakes
- Determining correct length; short but not too short, compare to old housing
+
* Determining correct length; short but not too short, compare to old housing
  
 
===Brakes===
 
===Brakes===
  
 
Anatomy
 
Anatomy
- Road: center-pull, single-pivot, dual-pivot
+
* Road: center-pull, single-pivot, dual-pivot
- Mountain: cantilever, straddle cable; linear-pull (v-brake), noodle
+
* Mountain: cantilever, straddle cable; linear-pull (v-brake), noodle
- Release mechanism
+
* Release mechanism
- Center adjust screw(s)
+
* Center adjust screw(s)
- Cartridge pads
+
* Cartridge pads
- Disc
+
* Disc
  
 
Pad Alignment
 
Pad Alignment
- Vertical; don't touch tire, or hang off the bottom of the rim
+
* Vertical; don't touch tire, or hang off the bottom of the rim
- Rotation; toe shouldn't point up or down
+
* Rotation; toe shouldn't point up or down
- Flat; surface should be parallel to rim face upon contact
+
* Flat; surface should be parallel to rim face upon contact
- Toe-in; noise
+
* Toe-in; noise
  
 
Pad Maintenance
 
Pad Maintenance
- Identify old dried out pads
+
* Identify old dried out pads
- Filing off lip
+
* Filing off lip
- Metal deposits
+
* Metal deposits
- Re-surfacing; put the file on the table
+
* Re-surfacing; put the file on the table
  
 
Exercise
 
Exercise
- Disconnect cable, remove pads, put barrel adjusters in middle
+
* Disconnect cable, remove pads, put barrel adjusters in middle
- Replace or file pads if necessary
+
* Replace or file pads if necessary
- Re-install pads and position
+
* Re-install pads and position
- Re-connect cable and adjust tension
+
* Re-connect cable and adjust tension
  
 
Braking Technique
 
Braking Technique
- Use both
+
* Use both
- Front does most of the stopping
+
* Front does most of the stopping
- Shift weight back for hard braking/hills
+
* Shift weight back for hard braking/hills
- If rear wheel locks under hard braking, ease up on front rather than rear - puts more weight on rear
+
* If rear wheel locks under hard braking, ease up on front rather than rear* puts more weight on rear
  
 
===Wheel Truing===
 
===Wheel Truing===
  
 
Anatomy
 
Anatomy
- Spokes; diameter, butting
+
* Spokes; diameter, butting
- Nipples
+
* Nipples
  
 
Tools
 
Tools
- Stand; 3 knobs
+
* Stand; 3 knobs
- Dish tool
+
* Dish tool
- Spoke wrenches; sizes
+
* Spoke wrenches; sizes
  
 
Types of Adjustment
 
Types of Adjustment
- True
+
* True
- Dish
+
* Dish
- Round
+
* Round
  
 
Basic Principle
 
Basic Principle
- Which way to turn nipples
+
* Which way to turn nipples
- Triangle geometry
+
* Triangle geometry
- Even numbers of spokes
+
* Even numbers of spokes
- Turn 90d at a time; be aware of spoke twist
+
* Turn 90d at a time; be aware of spoke twist
  
 
Technique
 
Technique
- Pick a high spot to work on
+
* Pick a high spot to work on
- Decide where it starts and ends
+
* Decide where it starts and ends
- Hold on to first spoke and count the rest
+
* Hold on to first spoke and count the rest
- Make adjustments
+
* Make adjustments
- Continue around rest of wheel before returning to the same spot
+
* Continue around rest of wheel before returning to the same spot
  
 
=Rule #1: Avoid Cans of Worms=
 
=Rule #1: Avoid Cans of Worms=

Revision as of 10:35, 26 August 2009

Class Planning

Class enrollment is managed using Brown Paper Tickets.

See BrownpaperTickets Instructions for details on setting up and managing class enrollment.

Curriculum

Day 1 : Flat Repair

Bicycle Anatomy

  • Frame tubes
  • Components
  • Brief quiz

Basic Chain Maintenance

Types of Lubricants

  • Dry vs. Wet; describe, compare
  • Different types of dry: teflon, parafin, silicon, plastic
  • Wet on dry ok; dry on wet not ok

Lubricating vs. Cleaning

  • How often, how do you know when
  • Basic lubrication; keep it slightly glistening
  • Light cleaning; rinse the dirt out w/ lube
  • Remove, soak and scrub
  • Remove all solvent before lubricating

Flat Repair

Tire/Rim Anatomy

  • Bead; materials
  • Rim hook
  • Engagement

Types of Valves

  • Identification
  • Operation
  • Rim compatibility; adapter gasket
  • Pump compatibility

Removing Wheel

  • Open brake
  • Proper gear; reasons

Removing Tire

  • Use of levers
  • User of hands
  • Stubborn tire tricks
  • Avoid puncture
  • Don't user metal levers

Finding the Leak

  • Types of flats
  • Relative orientation of tire/tube
  • Finding leak; circle it
  • Checking tire

Patching

  • Types of patches ; glue-on, self-adhesive
  • Vulcanization reaction
  • Prepping tube, applying glue
  • Applying patch

Re-assembly

  • Installing tire
  • Inflation steps; proper seating
  • Installing wheel on bike

Day 2 : Gears

Chain Replacement

Chain Wear

  • Indicator tool
  • Stretch
  • Cog wear, chain rings
  • Behavior/interaction of worn parts; skipping, stiff link

Chain Anatomy

  • Plates; inner, outer
  • Pin; flanged ends
  • "Link"; actually 2 segments
  • Sizes; road, 10spd, BMX/Track

Chain Breaker

  • Basic Principle; small vice
  • Different sizes; road/10spd, BMX/Track
  • Difference between upper and lower slots; upper spreads chain, lower compresses chain
  • Don't push the pin out!
  • Breaking* one step; joining* 2 steps
  • How to tell when it's correct

Gears

Cable Principles

  • Tension/Compression
  • Barrel Adjusters; 'loosening' the adjuster means 'tightening' the cable; start in the middle

Shifting Principles

  • Friction vs. Index
  • Backlash and Overshift
  • Indixing is in the shifter, not the deraileur
  • Standards, manufacturers and inter-compatibility; GripShift

Deraileur Anatomy

  • Parallelogram, cage, pulleys
  • Wrap Adjust Screw; keeps jockey pulley from hitting large cog
  • Limit Screws; demonstrate functionality
  • Compare to front; position on seat tube

Exercise

  • Shift out of smallest chain ring
  • Disconnect cable, put all screws/barrel adjusters out of position
  • Adjust screws first; just a bit wider than perfect to allow for overshift
  • Connect cable and adjust tension
  • Adjust for other chain rings

Shifting Technique (time permitting)

  • Cross gearing
  • Reduce load; timing w/in pedal stroke
  • Shift when decelerating
  • Shift before hills


Day 3 : Brakes

Cables/Housing Types

  • Cable sizes, ends
  • Housing sizes
  • Housing construction, brake vs. deraileur
  • Housing failure modes; why shifter is unsafe for brakes
  • Determining correct length; short but not too short, compare to old housing

Brakes

Anatomy

  • Road: center-pull, single-pivot, dual-pivot
  • Mountain: cantilever, straddle cable; linear-pull (v-brake), noodle
  • Release mechanism
  • Center adjust screw(s)
  • Cartridge pads
  • Disc

Pad Alignment

  • Vertical; don't touch tire, or hang off the bottom of the rim
  • Rotation; toe shouldn't point up or down
  • Flat; surface should be parallel to rim face upon contact
  • Toe-in; noise

Pad Maintenance

  • Identify old dried out pads
  • Filing off lip
  • Metal deposits
  • Re-surfacing; put the file on the table

Exercise

  • Disconnect cable, remove pads, put barrel adjusters in middle
  • Replace or file pads if necessary
  • Re-install pads and position
  • Re-connect cable and adjust tension

Braking Technique

  • Use both
  • Front does most of the stopping
  • Shift weight back for hard braking/hills
  • If rear wheel locks under hard braking, ease up on front rather than rear* puts more weight on rear

Wheel Truing

Anatomy

  • Spokes; diameter, butting
  • Nipples

Tools

  • Stand; 3 knobs
  • Dish tool
  • Spoke wrenches; sizes

Types of Adjustment

  • True
  • Dish
  • Round

Basic Principle

  • Which way to turn nipples
  • Triangle geometry
  • Even numbers of spokes
  • Turn 90d at a time; be aware of spoke twist

Technique

  • Pick a high spot to work on
  • Decide where it starts and ends
  • Hold on to first spoke and count the rest
  • Make adjustments
  • Continue around rest of wheel before returning to the same spot

Rule #1: Avoid Cans of Worms

Cans of worms are any parts or problems with the bike that threaten to eat up unexpectedly large portions of time. It's up to your discretion to decide what you can and can't handle, but you might want to avoid the following:

  • Serious rim problems
  • Anything bent totally out of whack
  • Excessively pitted bearing surfaces
  • Cup and cone bottom brackets
  • Suspension systems, pedal bearings
  • Anything that you are not comfortable fixing or servicing
  • Anything for which we lack the proper tools

These problems are outside the scope of a 12-hour class, and trying to fix them is a disservice to the students and to your sanity. If you run across a can of worms, suggest that they either bring it by during open hours or take it to a local bike shop.

Post Class Follow Up

You may consider having your students fill out a survey of the class.

After you finish teaching the class, come back to this wiki page and update it with your experiences. Also, be sure to say some summarizing words on the Yahoo group because you and your co-instructor are probably the only Bike Kitchen regulars that have contact with the class.

Consider recruiting a fellow Bike Kitchen mechanic to teach the next session of the class. Tell them how fun it was!