02/21/10
RSB106.B
1 of 4
SERVICE
BULLETIN
Subject:
K/S 5500 Series Wheelchair Lifts
Applicable Products:
S55XX and K55XX Series Products
Effectivity:
ALL Units Produced Prior to March 2007 with Serial Numbers 212952 or Lower
RICON SERVICE BULLETINS ARE FOR USE BY PROFESSIONAL SERVICE TECHNICIANS, AND ARE NOT INTENDED FOR USE BY NON-
PROFESSIONALS OR AMATEURS. SERVICE BULLETINS ALERT TECHNICIANS TO ISSUES THAT MAY OCCUR WITH RICON PRODUCTS,
AND ARE INTENDED TO ASSIST THE TECHNICIAN IN THE PROPER SERVICE OF THOSE PRODUCTS.
PROFESSIONAL SERVICE TECHNICIANS HAVE THE BACKGROUND AND KNOWLEDGE TO PERFORM MAINTENANCE WORK PROPERLY
AND SAFELY.
AN ISSUE DESCRIBED BY A SERVICE BULLETIN DOES NOT NECESSARILY APPLY TO EVERY UNIT IN A PRODUCT LINE. A RICON
AUTHORIZED SERVICE TECHNICIAN WILL BE ABLE TO DETERMINE WHICH UNITS CAN BENEFIT FROM THE INFORMATION PROVIDED
HERE.
Introduction
This bulletin provides a brief description of the technical issue and description of the corrective action required.
Incorporation
Ricon requires the incorporation of this service bulletin as soon as possible.
Information
Units manufactured prior to March 2007 with Serial Numbers 212952 or lower, have been identified to have additional
stroke available in the hydraulic cylinders when the lift is fully stowed. The vertical arms can permanently deform if the
operator attempts to use the manual back-up pump (only with a fully stowed lift). Also, the lift should be inspected to
ensure that the deployment of the bridgeplate is timed correctly. Pre-mature deployment will create contact with the
bridgeplate and the front of the baseplate which will cause damage to the lift and/or injury to passenger.
Caution
See warning below.
Corrective Action
Hydraulic Cylinder Retrofit Kit (P/N 38350)
Note:
This corrective action is only for wheelchair lifts manufactured prior to March 2007. If hydraulic cylinders have
been previously replaced with hydraulic cylinders manufactured after March 2007 then DO NOT install retrofit
kit.
1. To determine if the hydraulic cylinders are Post March 2007, measure the hydraulic cylinder housing.
Note:
If the hydraulic cylinder housing measures approximately 21” (without gland nut) then these are Post March
2007 and the retrofit kit should NOT be installed.
2. If the wheelchair lift has a manufactured date prior to March 2007 then follow installation instructions
(32ii404e) for Hydraulic Cylinder Retrofit Kit (P/N 38350).
WARNING!
EXERCISE CAUTION WHEN MANIPULATING HYDRAULIC COMPONENTS. THEIR PRECISION
FINISH AND SOFT SEALS MAY EASILY BECOME DAMAGED BY HITTING OR DROPPING.
Verification of Proper Bridgeplate Deployment Timing
1. Inspect the wheelchair lift to ensure the bridgeplate guide blocks are installed on the baseplate as shown in
Figure 1
.
2. If the bridgeplate guide blocks are not present then follow installation instructions (32ii386e) for Installation of
Guide Blocks Kit (P/N 35708).
3. Raise the wheelchair lift to vehicle floor level to verify proper bridgeplate deployment timing as shown in
Figure 2
.
