Below are full rebuild instructions for your OneUp V2 Dropper Post. This service should take less than 20 minutes and should be completed every 250-350hrs of riding depending on the conditions in which to ride. Always check your air pressure after servicing. The pressure should be 250-300psi with the post fully extended.
Users are encouraged to perform regular maintenance earlier if required. If something seems rough or unusual after servicing please discontinue riding and contact email@example.com to avoid additional damage to the post.
- Waterproof grease (ie. Slickoleum, Slick Honey)
- Rubbing alcohol
- Needle-nose Pliers
- 2 mm hex
- 14 mm or 17mm wrench (or adjustable wrench)
- Toothbrush, and Lint-free Cloth
EXPLODED VIEW FOR REFERENCE
Step 1: Remove Seat and UPPER/LOWER CLAMP (2) and (3)
- Move the Dropper to about 50mm (2") below full travel
- *TIP* remove the rear clamp bolt fully and do not adjust the front clamp bolt. When you reinstall the seat, torque the rear bolt to 8Nm (70 in-lbs) and the seat angle will be correct.
Step 2: Remove the VALVE CAP/COVER (5)
- This cap will either be a threaded cap (left) or a slide-on cap (right)
Step 3: Remove CARTRIDGE LOCKRING (6)
- Using a pair on needle-nose pliers unthread and remove the Cartridge Lockring.
Step 4: Unscrew ACTUATOR (16) from LOWER TUBE (12)
- For V2.1 actuators use a 14mm (9/16") spanner or a adjustable wrench
- For V2.0 actuators use a 17mm spanner or a crescent wrench
- Unscrew the bottom green actuator using the wrench
Step 5: Remove LOCK BOLTS (17)
- Use a 2mm hex to completely remove the actuator lock bolts.
Step 6: Remove ACTUATOR (16) from CARTRIDGE (14)
- Slide the actuator and foam washer off of shaft.
Step 7: Remove CARTRIDGE (14) from Dropper Assembly
- Slide the cartridge out of the dropper assembly.
- Make sure to not lose Cartridge washer (13)
- If you are only completing a cartridge swap, stop here and complete steps 1-6 in reverse order.
Step 8: Unscrew MID CAP ASSEMBLY (8)
- Unscrew the mid cap assembly by hand or using a strap wrench and slide it up towards the seatpost head.
Step 9: Remove LOWER TUBE (12) from UPPER TUBE (7)
- Slide the lower tube away from the upper tube to fully remove it
- Remove old grease from inside the lower tube
Step 10: Remove GUIDE PINS (10)
- Using a small pick or the tip of a ziptie remove the three guide pins
Step 11: Remove BUSHINGS (9) and (11)
- Remove the upper and lower bushings by hand
Step 12: Remove MID CAP ASSEMBLY (8)
- Slide the Mid Cap Assemby off of the Upper Tube
- Remove old grease from the Upper Tube
- Clean the upper tube with rubbing alcohol
Step 13: Assess parts that need replacement
- Parts 8a-11 are included in SP1C0053
- Oversized pins 19 & 20 are included in SP1C0061
Step 14: Reinstall MID CAP ASSEMBLY (8), GUIDE PINS (10) and BUSHINGS (9) and (11)
- With Parts 8a-8e assembled slide Mid Cap Assembly onto the Upper Tube
- Reinstall Upper and Lower bushings
Reinstall Guide Pins or install oversized guide pins
Step 15: Apply grease
- Using a toothbrush apply grease to the area around the brass pins, the bushings of the upper assembly and inside the outer post body.
Step 16: Reassemble LOWER TUBE (12) and UPPER TUBE (7)
- Align the brass pins with machined grooves in the lower post. and the lower tube laser with the rear of the upper tube
Step 17: Secure MID CAP ASSEMBLY (8)
- Thread the Mid Cap Assembly into the lower tube and tighten by hand or with strap wrench
Step 18: Reinstall CARTRIDGE (14) into Dropper Assembly
- Slide the cartridge into the dropper assembly.
- Make sure Cartridge washer (13) is properly in place
- Reinstall Cartridge Lockring (6) and Valve Cap/Cover (5)
Step 19: Reassemble ACTUATOR (16)
- Slide the foam washer onto the cartridge shaft
- Slide the actuator over the end of the cartridge shaft.
- Install the thru-bolts making sure they slide through the grooves of the cartridge shaft.
- Tighten the actuator securing pins using 2mm hex hand tight.
Step 20: Secure ACTUATOR (16) to LOWER TUBE (12)
- Thread the lower actuator assembly into the lower post body
- Tighten using the same wrench as was used for disassembly
Step 21: Reinstall Seat and UPPER/LOWER CLAMP (2) and (3)
- Remember the tip from Step 1
Step 22: Reinstall the post and go ride your bike.