Difference between revisions of "External Maintenance"
From The Bike Kitchen
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=Curriculum= | =Curriculum= | ||
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Bicycle Anatomy | Bicycle Anatomy | ||
| − | + | * Frame tubes | |
| − | + | * Components | |
| − | + | * Brief quiz | |
===Basic Chain Maintenance=== | ===Basic Chain Maintenance=== | ||
Types of Lubricants | 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 | 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=== | ===Flat Repair=== | ||
Tire/Rim Anatomy | Tire/Rim Anatomy | ||
| − | + | * Bead; materials | |
| − | + | * Rim hook | |
| − | + | * Engagement | |
Types of Valves | Types of Valves | ||
| − | + | * Identification | |
| − | + | * Operation | |
| − | + | * Rim compatibility; adapter gasket | |
| − | + | * Pump compatibility | |
Removing Wheel | Removing Wheel | ||
| − | + | * Open brake | |
| − | + | * Proper gear; reasons | |
Removing Tire | Removing Tire | ||
| − | + | * Use of levers | |
| − | + | * User of hands | |
| − | + | * Stubborn tire tricks | |
| − | + | * Avoid puncture | |
| − | + | * Don't user metal levers | |
Finding the Leak | Finding the Leak | ||
| − | + | * Types of flats | |
| − | + | * Relative orientation of tire/tube | |
| − | + | * Finding leak; circle it | |
| − | + | * Checking tire | |
Patching | Patching | ||
| − | + | * Types of patches ; glue-on, self-adhesive | |
| − | + | * Vulcanization reaction | |
| − | + | * Prepping tube, applying glue | |
| − | + | * Applying patch | |
Re-assembly | Re-assembly | ||
| − | + | * Installing tire | |
| − | + | * Inflation steps; proper seating | |
| − | + | * Installing wheel on bike | |
==Day 2 : Gears== | ==Day 2 : Gears== | ||
| Line 74: | Line 68: | ||
Chain Wear | Chain Wear | ||
| − | + | * Indicator tool | |
| − | + | * Stretch | |
| − | + | * Cog wear, chain rings | |
| − | + | * Behavior/interaction of worn parts; skipping, stiff link | |
Chain Anatomy | Chain Anatomy | ||
| − | + | * Plates; inner, outer | |
| − | + | * Pin; flanged ends | |
| − | + | * "Link"; actually 2 segments | |
| − | + | * Sizes; road, 10spd, BMX/Track | |
Chain Breaker | 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=== | ===Gears=== | ||
Cable Principles | Cable Principles | ||
| − | + | * Tension/Compression | |
| − | + | * Barrel Adjusters; 'loosening' the adjuster means 'tightening' the cable; start in the middle | |
Shifting Principles | Shifting Principles | ||
| − | + | * Friction vs. Index | |
| − | + | * Backlash and Overshift | |
| − | + | * Indixing is in the shifter, not the deraileur | |
| − | + | * Standards, manufacturers and inter-compatibility; GripShift | |
Deraileur Anatomy | 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 | 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) | Shifting Technique (time permitting) | ||
| − | + | * Cross gearing | |
| − | + | * Reduce load; timing w/in pedal stroke | |
| − | + | * Shift when decelerating | |
| − | + | * Shift before hills | |
| Line 128: | Line 122: | ||
Cables/Housing Types | 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=== | ===Brakes=== | ||
Anatomy | 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 | 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 | Pad Maintenance | ||
| − | + | * Identify old dried out pads | |
| − | + | * Filing off lip | |
| − | + | * Metal deposits | |
| − | + | * Re-surfacing; put the file on the table | |
Exercise | 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 | 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=== | ===Wheel Truing=== | ||
Anatomy | Anatomy | ||
| − | + | * Spokes; diameter, butting | |
| − | + | * Nipples | |
Tools | Tools | ||
| − | + | * Stand; 3 knobs | |
| − | + | * Dish tool | |
| − | + | * Spoke wrenches; sizes | |
Types of Adjustment | Types of Adjustment | ||
| − | + | * True | |
| − | + | * Dish | |
| − | + | * Round | |
Basic Principle | Basic Principle | ||
| − | + | * Which way to turn nipples | |
| − | + | * Triangle geometry | |
| − | + | * Even numbers of spokes | |
| − | + | * Turn 90d at a time; be aware of spoke twist | |
Technique | 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= | =Rule #1: Avoid Cans of Worms= | ||
| Line 213: | Line 207: | ||
=Post Class Follow Up= | =Post Class Follow Up= | ||
| − | You may consider having your students fill out a [[ | + | You may consider having your students fill out a [[http://docs.google.com/Doc?docid=0ATZLtblK5DLAZGdwZjY4OG5fM2NzNHN2cGhz&hl survey of the class]]. Put responses in the Classes folder in the office. |
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. | 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! | Consider recruiting a fellow Bike Kitchen mechanic to teach the next session of the class. Tell them how fun it was! | ||
Latest revision as of 10:31, 23 February 2017
Contents
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]. Put responses in the Classes folder in the office.
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!
