Merits p314 series User manual

Merits
P314 series
Service Manual
Nov.10.2006 V1

Index
1. Introduction ............................................................................1
2. Service guide ...........................................................................1
2.1. How to replace or repair the seat assembly............................................ 1
2.1.1. To replace the seat body ................................................................................... 1
2.1.2. To replace the hook and the seat mounting ....................................................... 2
2.1.3. To replace the seat post assembly ..................................................................... 2
2.1.4. To replace the left/right armrest ........................................................................ 4
2.2. How to replace or repair the body assembly.......................................... 5
2.2.1. To replace the shroud ....................................................................................... 5
2.2.2. To replace the footplate assembly ..................................................................... 7
2.2.3. To replace the anti-tipper wheel assembly ........................................................ 8
2.2.4. To replace the caster wheel assembly................................................................ 9
2.2.5. To replace the driver wheel assembly ............................................................. 10
2.2.6. To replace the frame assembly........................................................................ 11
The numbers shown in this service manual is just for reference. The part
numbers should be in accordance with current exploded drawing.

1
1. Introduction
The purpose of this manual is to provide dealers and/or distributors with
the product information and instructions that are required for servicing the
P314 powerchair.
2. Service guide
The P314 powerchair consists of three main parts:
nSeat assembly
nBody assembly
nElectrical system (Please refer to P3/P7 series Shark or VR2 service
manual)
2.1. How to replace or repair the seat assembly
The Seat assembly includes the seat body, the seat mounting, the seat
hook, the trapeze bar upright weldment (front) assembly, the seat
tower (rear) assembly, the seat mount connector assembly and the
left/right armrest.
2.1.1. To replace the seat body
◆When should you replace the seat body?
◇If the seat body is worn out.
◇If the seat body is pierced or scratched by something.
◇If the powerchair crashed cause the seat body out of shape.
◆How to replace the seat body?
◇Please proceeding steps as follows if it has to replace.
Replace the seat body by the following steps if it is broken.
a. Use hex tools to loosen hex fixed bolt (3.10) on the hook (3.09)
and remove it from the seat body.
b. Use hex tools to loosen hex fixed bolt (3.08) on the seat

2
mounting (3.03) and remove the seat body from the seat
mounting if it is broken.
2.1.2. To replace the hook and the seat mounting
◆When should you replace the hook and the seat base mounting
assembly?
◇If the hook and the seat base mounting is deformation.
◇If the hook and the seat base mounting out of shape due to an
accident.
◆How to replace the hook and the seat base mounting assembly?
◇Please proceeding steps as follows if it has to replace.
Follow preceding step of 2.1.1. You can remove the hook and the
seat mounting too if it is worn out or deformed.
2.1.3. To replace the seat post assembly
◆When should you replace the seat post assembly?
◇If the seat post is deformation.
◇If the seat post out of shape due to an accident.
◆How to replace the seat post assembly?
◇Please proceeding steps as follows if it has to replace.
The seat post assembly includes the trapeze bar upright weldment

3
(front) assembly, the seat tower (rear) assembly and the seat
mount connector assembly.
a. To replace the trapeze bar upright weldment (front)
assembly: Pull up the hitch-pin (3.15) frist. Pull up and
remove the trapeze bar upright weldment (front) assembly
(3.42) if it is worn out or deformed.
b. To replace the seat tower (rear) assembly: Pull up the
Hitch-pin (3.15) frist. Pull up and remove the seat tower (rear)
assembly (3.44) if it is worn out or deformed.
c. To replace the seat mount connector assembly: Take the
C-clip (3.14) out from the seat mount connector by pliers and
loosen the nut (1.20) to remove the seat mount connector
assembly if it is worn out or deformed.

4
2.1.4. To replace the left/right armrest
◆When should you replace the armrest?
◇If the armrest is worn out.
◇If the armrest is pierced or scratched by something.
◇If the powerchair crashed cause the armrest out of shape.
◆How to replace the armrest?
◇Please proceeding steps as follows if it has to replace.
Use hex tools to loosen bolt (3.29) under armrest to disassemble
armrest from armrest support plate. If the armrest is broken, then
replace it.
Note: The arm tube protective shrouds (3.34 and 3.35) are option
parts for powerchair.

5
2.2. How to replace or repair the body assembly
The Body Assembly includes shroud, footplate assembly, anti-tipper
wheel assembly, caster wheel assembly, driver wheel assembly and the
frame assembly.
2.2.1.To replace the shroud
◆When should you replace the shroud?
◇If your powerchair can not avoid knocked or bumped cause the
shroud broken.
◆How to replace the shroud?
◇Please proceeding steps as follows if it has to replace.
Check for deformations or cracks on the shroud.
For VR2 Controller:
a. Use screw driver to loosen the screw(2.06) to remove the main
shroud and then replace it.
b. Loosen the screw (1.18) to remove controller (1.17).
c. Use screw driver to loosen the screw(2.06) to remove the front
shroud and then replace it.

6
For Shark Controller:
a. Use screw driver to loosen the screw(2.06) to remove the main
shroud and then replace it.
b. Hold the screw (1.18) and loosen the nut (1.19) to remove
controller (1.17).
c. Use screw driver to loosen the screw(2.06) to remove the front
shroud and then replace it.

7
2.2.2.To replace the footplate assembly
◆When should you replace the footplate assembly?
◇If the footplate assembly is deformation.
◇If the footplate assembly out of shape due to an accident.
◆How to replace the footplate assembly?
◇Please proceeding steps as follows if it has to replace.
Replace the footplate assembly if it is worn out or deformed. Hold
the screw (8.07) and loosen the nut (8.08) and then replace the
footplate assembly.
Hole the screw (8.03) and loosen the nut (8.10) then remove the
footplate. If the footplate is worn out, then replace it.

8
2.2.3.To replace the anti-tipper wheel assembly
◆When should you replace the anti-tipper wheel assembly?
◇If the anti-tipper wheel assembly is worn out.
◇If your powerchair can not avoid knocked or bumped cause the
anti-tipper wheel broken.
◆How to replace the anti-tipper wheel assembly?
◇Please proceeding steps as follows if it has to replace.
Replace the anti-tipper wheel assembly if it is worn out or
deformed. Hold the screw (1.62) and loosen the nut (1.69) and
then replace the anti-tipper wheel assembly.
Replace the anti-tipper wheel if it is worn out or deformed. Hold
the screw 1.66) and loosen the nut (1.64) and then replace the
anti-tipper wheel.

9
2.2.4.To replace the caster wheel assembly
◆When should you replace the caster wheel assembly?
◇If the caster wheel assembly is worn out.
◇If the caster wheel assembly is out of shape due to an accident.
◆How to replace the caster wheel assembly?
◇Please proceeding steps as follows if it has to replace.
The caster wheel assembly is composed of a caster wheel and
fork.
Replace the caster wheel assembly by the following steps if, after
inspection, the assembly is found to be deformed.
a. Remove the caster cap.
b. Fix the caster wheel in place, use wrench to loosen the nut(5.03)
and then remove the caster wheel assembly.
Replace the caster wheel by the following steps if it is worn out or
deformed.
a. Hold the screw (5.09) and loosen the nut (5.14) and then
remove the caster wheel.
b. If the PU tire is worn out, then replace it.

10
PU form (two piece of rims)
solid tire (one piece of rim)
2.2.5.To replace the driver wheel assembly
◆When should you replace the driver wheel assembly?
◇If the driver wheel assembly is worn out.
◇If the driver wheel assembly is out of shape due to an accident.
◆How to replace the driver wheel assembly?

11
◇Please proceeding steps as follows if it has to replace.
Loosen the nut (5.59) and washer (5.58) to replace the driver
wheel assembly if it is worn out or deformed.
Replace the driver wheel by the following steps if it is worn out
or deformed.
a. Follow preceding step above.
b. If the PU tire is worn out, replace it by loosening screw (5.33)
and replace it.
2.2.6.To replace the frame assembly
◆When should you replace the frame?
◇If the frame is deformation.

12
◇If your powerchair can not avoid knocked or bumped cause the
frame deform.
◇If the frame is out of shape due to an accident.
◆How to replace the frame?
◇Please proceeding steps as follows if it has to replace.
The frame assembly is composed of the front cross beam and the
frame.
Replace the cross beam by following steps if there is noise or
sticking motion during operation of the powerchair.
a. Remove the seat assembly, the shroud and the caster wheel
assembly by step 2.1 and 2.24.
b. Use hex tools to hold the screw (1.46) and loosen the nut (1.49)
then remove the cross beam. If the cross beam is worn out or
deformed. (See next page)
Check the whole body assembly by the following steps if there is
noise or sticking motion during operation of the powerchair.
a. In addition to follow preceding step above, it has to remove the
footplate assembly and the anti-tipper assembly by step 2.1,
2.2.1, 2.2.2 and 2.2.3 previously.
b. Use hex tools to loosen six pieces the screw (5.60 and 5.61) to
remove motor and gearbox assembly. (See page 11)
c. Loosen the nut (1.79) first. Hold the screw (1.73) and loosen
the nut (1.76) to remove the rear articulating beam assembly
(L/R).
d. Hold the screw (1.08) and loosen the nut (1.10) to remove the
freewheel release lever assembly (L/R).
e. Hold the screw (1.24) and loosen the nut (1.25) to remove the

13
battery box tube.
f. Remove the main tube cap.
g. Check for deformations or cracks on the frame and replace the
frame should they exit.
n