Testing (B.80.A.82 - G.40.A.20); Safety Switch - Testing (B.80.A.90.81 - G.40.A.20) - New Holland CX720 Repair Manual

Problem
Engine does not crank
when key is turned to start
(continued)
Click is heard when key
is turned but engine does
not crank
Engine cranks slowly
Starter motor continues
to operate when key is
released from START to
RUN position
POWER PRODUCTION - STARTING SYSTEM
Possible Cause
Ignition Switch
Neutral Switch
Neutral Start Relay
Start Relay
Starter Motor
Starter Motor
Start Relay
Neutral Start Relay
Starter Motor
Engine mechanical problem
Ignition Switch
A - Ignition Switch Power Supply Test,
andStart control Start switch - Testing
(B.80.A.90.82 - G.40.A.20)
B - Ignition Switch Test points 1 and
2Start control Start switch - Testing
(B.80.A.90.82 - G.40.A.20).
C - Neutral Switch Test.Start control
Safety switch - Testing (B.80.A.90.81 -
G.40.A.20)
Refer to Transmission Section of Service
Manual and check Neutral Switch adjust-
ment.
D -Neutral Start Relay TestStart con-
trol
(B.80.A.90.84 - G.40.A.20).
E - 12V Start Relay Test (12V Sys-
tem)Start control Start relay - Testing
(B.80.A.90.80 - G.40.A.20)
F- 24V Start Relay Test (24V Sys-
tem)Start control Start relay - Testing
(B.80.A.90.80 - G.40.A.20).
G -12V Starter Motor TestEngine starter -

Testing (B.80.A.82 - G.40.A.20)

H -24V Starter Motor TestEngine starter -
Testing (B.80.A.82 - G.40.A.20).
G -12V Starter Motor TestEngine starter -
Testing (B.80.A.82 - G.40.A.20)
H -24V Starter Motor TestEngine starter -
Testing (B.80.A.82 - G.40.A.20).
E - 12V Start Relay Test (12V Sys-
tem)Start control Start relay - Testing
(B.80.A.90.80 - G.40.A.20)
F - 24V Start Relay Test (24V Sys-
tem)Start control Start relay - Testing
(B.80.A.90.80 - G.40.A.20).
D -Neutral Start Relay TestStart con-
trol
(B.80.A.90.84 - G.40.A.20).
G -12V Starter Motor Test, Engine starter
- Testing (B.80.A.82 - G.40.A.20)
H -24V Starter Motor Test, test points 1
thru 5, 8 and 9.Engine starter - Testing
(B.80.A.82 - G.40.A.20).
Refer to Engine Section in Service Manual.
B - Ignition Switch Test, and confirm
that switch opens when key is re-
leased.Start control Start switch - Test-
ing (B.80.A.90.82 - G.40.A.20).
2 4/7/2006
B.80.A / 12
Correction
Neutral start relay
Neutral start relay
- Testing
- Testing