Lull 6K Service Manual - Manual (Page 549)

Service Manual — Models 644B, 6K, 844C, 8K, 1044C, 10K 8-1
Section 8 — Transmission
Fig. 8-1: ZF Transmission
Description
ZF Transmission with DW-2 Shifter
644B-37 (S/N 101–880)
6K-37 (S/N 101–397)
6K-42 (S/N 101–131)
644B-42 (S/N 101–241)
844C-42 (S/N 101–783)
8K-42 (S/N 101–261)
1044C-42 (S/N
101–121)
10K-42 (S/N 101–107)
1044C-54 (S/N 101–25)
10K-54 (S/N 101–107,
109) The ZF transmission system that uses a DW-2 shifter employs an EST-19
microprocessor control unit and contains the following six components:
1. DW-2 Speed Range/Direction Selector (Part Number 35367A)
The DW-2 speed range and direction selector is a column-mounted
shifter consisting of a rotary switch for speed range selection and
microswitches for neutral, forward, and reverse selection. It sends input
signals to the EST-19 microprocessor control unit.
2. EST-19 12V Microprocessor Control Unit
a. For 3-Speed Transmission:
P31564 — Declutches 1st and 2nd Only (no longer available)
37494X — Declutches All Speed Ranges
b. For 4-Speed Transmission:
P31565 — Declutches 1st and 2nd Only (no longer available)
37495X — Declutches All Speed Ranges
This control unit processes all driver instructions concerning speed
range and direction (inputs from the shifter). It also interprets two
frequency inputs from the inductive transmitter and processes digital
inputs for clutch cut-off from the parking brake pressure switch, the
service brake pressure switch, and rear oscillation lock circuitry.
E1014