The 2013 Monarch RT3 B1 shock can be serviced using the kits below.
Basic service:
Solo Air air can: 00.4315.032.330 AM REAR SHOCK AIR CAN SERVICE KIT, 50 HOUR - (INCLUDES SEAL GREASE/OIL) - MONARCH RT3 (2013)
High Volume air can: 00.4315.032.340 AM REAR SHOCK AIR CAN HIGH VOLUME SERVICE KIT, 50 HOUR - (INCLUDES SEAL GREASE/OIL) - MONARCH RT3 (2013)
Full service: (all air cans)
11.4118.015.000 REAR SHOCK SERVICE KIT - FULL SERVICE MONARCH 3 RT3 (2013)
RockShox service kits and spare parts are best obtained through your local shop or dealer. See our dealer locator, below, to find a dealer near you. If no one is currently listed near you, then please search for local shops via your preferred web browser.
https://www.sram.com/en/dealer-locator
Manuals and additional information about RockShox and SRAM components can be found at our service site, linked below.
https://www.sram.com/en/service
Further questions?
Reach out to Rider Support by Asking A Question at the link below.
https://www.sram.com/en/rockshox/campaigns/rockshox-rider-support