Serial Number Codes - Allied Systems H4A Operating Manual

Winch Model
H4A = Production
K4A = Special
Hydraulic Operation Type
H = High Performance
(Hydrostatic or Hydraulic Two Speed)
T = Standard
(Tractor Controls & Pump)
Gear Ratio (Code #)
(1) = 83:1
(2) = 116:1
(3) = 94:1
(4) = 125:1
Abbreviation List
SCH = Self-Contained Hydraulics
NON-SCH = External (Pump) Hydraulics
PFR = Power Forward and Reverse
BO = BRAKE-OFF
FS = FREESPOOL

Serial Number Codes

H4A H 1 Y
Maintenance
1555 C17
R = SCH (PFR, FS), Enclosed Frame
Y = NON-SCH (PFR, FS), Open Frame
+B = SCH (PFR, BO, FS), Enclosed Frame
+E = NON-SCH (PFR, BO, FS), Enclosed Frame
+Z = NON-SCH (PFR, FS), Enclosed Frame
Notes: 1. In addition to the nameplate, the serial
number is stamped on the top right-hand
side of the frame.
2. Circled numbers in Figure 11 indicate
possible gear ratios.
3.
BRAKE-OFF option was last used on
S/N H4A-1014.
Vehicle Code
See Figure 11
Sequence Number
Internal Options
+ = Non Current
(See Note 3 below)
11