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Subject: Re: [LML] Re: lnc2 hydraulic gear solenoid
X-Original-Cc: John Cooper <snopercod@citcom.net>
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Thanks, John.
I melted the down solenoid by (unnecessarily)  leaving the current on with the pump CB pulled, while adjusting the gear position green slight switches.  
The ST81 (NAPA) replacement solenoid, used on many cars, had a note with it warning that it NOT be used if there was an on-board computer, unless spike suppression diodes were added.
As I have a dual glass panel from Grand Rapids Tech, and other digital gear i opted to add the diodes (3a, 400v), instad of trying to find 2 continuous duty solenoids.
Others using in-system computers should take note.
Terrence O'Neill
L235/320 N211AL
KGRE Greenville, IL
---- John Cooper <snopercod@citcom.net> wrote: 
> I used two Bosch 0 332 002 150 relays to control my hydraulic pump 
> motor. They're a lot lighter, and rated for 40,000 operations with an 
> inductive load. That's a lot of gear cycles. You will find them 
> available many places on the Internet.
> 
> General Specifications Part Number: 0 332 002 150
> Voltage: 12 V
> Form: SPST
> Enclosure: Standard cover w/bracket
> Contact Material: Dual Silver Nickel
> Life Tests Resistive Load - N/O: 75 A - 100,000 cycles
> Resistive Load - N/C: n/a
> Motor Load - N/O: 60 A (250 A In-rush)- 40,000 cycles
> Motor Load - N/C: n/a
> Lamp Load - N/O: n/a
> Lamp Load - N/C: n/a Mechanical Life: 1,000,000
> Coil Specifications Coil Operating Current: 290 mA
> Equivalent Coil Resistance: 46 +/- 3 ohm
> Pull-in Voltage: <= 8.0 V
> Drop-out Voltage: 1.5 - 4.0 V
> Operating Conditions Operating
> Temperature: -40 C to +100 C Humidity Test: 95% for 7 days
> Salt Spray Test: 144 hours Dust Test: 8 hours