Chery QQ6 (S21) / S12LHD. Manual — part 235
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1) Model of the transmission case
Model of the transmission case is composed of code QR, number of shift gears of the transmission,
maximum transmission torque, characteristic code and structure specification number.
A complete transmission case model is as follows:
□ □ ○ ○○ □ □ □
Structure specification number
Characteristic code
Maximum transmission torque (kg·m)
Number of shift gears of the transmission case
Code QR
Among which, ○ indicates an Arabic numeral while □ indicates a letter.
2) Leaving factory number
Leaving factory number is composed of endnote of assembly part number (for that without endnote, us
AA), character code of the year of production, character code of the month of production, sequence
number of this transmission case among the transmission cases manufactured in that month and start
stop sign “*”. See Table 1 and Table 2 for check list of character codes of the year and of the month.
Complete form of leaving factory number of a transmission case is as follows:
*
□ □
□
□
○○○○○ *
Character code of the month
Among which, ○ indicates an Arabic numeral, □ indicates a letter and indicates an Arabic numeral or a
letter. The endnote locates at tail end of the part code, for a fundamental model, no endnote. The endnote
should be modified when modification is made to structure, dimension, material, heat treatment requirements
and surface treatment etc. of the part or assembly on the basis of original product. The English letter in the
code should be upper case letter (use in sequence with “A” as the first), in order to avoid confusion, do not
use “I”, “O” and “X”. When the modification does not affect interchangeability, use “A” as the first; when
the modification affects interchangeability, skip “A”, use “B” as the first.
Table 1 Character Codes Indicating the Years
Year
Code
Year
Code
1999
X
2015
F
2000
Y
2016
G
2001
1
2017
H
2002
2
2018
J
2003
3
2019
K
Sequence number among the product of the
same model manufactured in that month
Character code of the year
Endnote of assembly part number
6
2004
4
2020
L
2005
5
2021
M
2006
6
2022
N
2007
7
2023
P
2008
8
2024
R
2009
9
2025
S
2010
A
2026
T
2011
B
2027
V
2012
C
2028
W
2013
D
2029
X
2014
E
2030
Y
Table 2 Character Codes Indicating the Months
Month
Code
Month
Code
January
A
July
G
February
B
August
H
March
C
September
J
April
D
October
K
May
E
November
L
June
F
December
M
3) Illustration
For example: QR513MHA MH5H00001 indicates the first transmission case with the model as
QR513MHA manufactured in August, 2005.
IV. Specification of QR513 Transmission
QR513 Series Transmission
Type
Machine Gear Mesh
Model
QR513MHA
QR513MHB
Gear shift
Velocity
Ratio
Teeth Ratio
Velocity
Ratio
Teeth Ratio
First Gear
3.545
39/11
3.167
38/12
Second Gear
2.05
41/20
2.05
41/20
Third Gear
1.423
37/26
1.423
37/26
Fourth Gear
1.065
33/31
1.065
33/31
Fifth Gear
0.865
32/37
0.865
32/37
Reverse Gear
3.364
37/11
3.364
37/11
Main reduction ratio
4.056
73/18
75
16
7
Speedometer
0.806
29/36
0.806
29/36
Largest input torque
130 Nm
Lubricant oil type
GL-4 75W-90
Volume of lubricant
1.8L
V. Maintenance Instruction
l In order to ensure maintenance quality of the transmission, when operating, please be careful
and ensure cleanness of each part of the transmission.
l Use appropriate tools or special tools.
l Strictly follow the specification to assembly or adjustment to maintain so as to ensure that the
transmission can accomplish a favorable working position.
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Chapter Two Decomposition of QR513 Transmission
I. Decomposition Process for QR513 Transmission
1. Bleeding lubricant in transmission
First, drive the vehicle onto a maintenance platform or hoist the vehicle and keep it on a horizontal
plane, screw off the bleeding plug as shown by the arrowhead, and then use a clean container to
accommodate lubricant of the transmission to completely bleed the lubricant in the transmission.
Figure 1
2. Disassembly of external parts of transmission
Switch the transmission to NEUTRAL position; use an appropriate tool to remove the locating seat of
the fork shaft as shown in Figure 2; Connecting bolts for gearshift housing and transmission housing and the
screws for backup lamp switch and idler shaft.
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