Service & Maintenance Question
Q1 Is the PTO Sx (labeled on the schematic) on an...
Service & Maintenance Question posted June 22, 2018 by richard brack
34 Views, 4 Comments
Question:
Q1 Is the PTO Sx (labeled on the schematic) on an RZ4619 actually the blade control sx?
Q2 On the RZ4619, the schematic shows a "solenoid" and an "electric clutch." I assume the electric clutch (in the lower left corner of the pictorial) is the blade control clutch just under the engine. What is the "solenoid" (in the upper left corner) and what does it control?
Q3 The schematic says the "seat unoccupied" for the drawing, but the drawing shows the seat sx to be in the closed position. Are both items correct? Is the seat sx closed if the seat is unoccupied?
Q2 On the RZ4619, the schematic shows a "solenoid" and an "electric clutch." I assume the electric clutch (in the lower left corner of the pictorial) is the blade control clutch just under the engine. What is the "solenoid" (in the upper left corner) and what does it control?
Q3 The schematic says the "seat unoccupied" for the drawing, but the drawing shows the seat sx to be in the closed position. Are both items correct? Is the seat sx closed if the seat is unoccupied?
Details:
The questions come from page 58 on my Operator Manual for the RZ4619. This manual is part number 115 127127 IR, dated 10-15-08.
Answer
I am assuming the Sx as you posted got it is the Sw (switch) on the diagram.
Yes PTO switch is the blade electric clutch control switch.
The solenoid is your starter solenoid and controls the starter as the ignition switch can not handle the 70+ amps the starter draws during operation
And yes the seat switch is closed when unoccupdied. Btw you can not simply unplug it to bypass it either as there is a built-in shorting device in the connector.
Be the first to rate this
|
Thank you for your speedy and knowledgeable reply.
Mea culpa, Sx is used frequently for "switch" in the electronics industry; I should have spelled it out.
My problem is that I started the mower, had mowed about 20', and the mower died. It did not die like it was out of fuel, or a part (spark plug e.g.) was going into failure, but rather died like I had turned the ignition OFF (a sensitive difference that many might not recognize). I put everything in "start-up" position and the engine started. But as I released the parking brake, the engine died. A quick brake-ON and the engine resumed; brake-OFF and it dies as the brake switch is activated. It appears to be an electrical control circuit problem so I was reaching out for clarification of some schematic anomalies. I am using ink to make note of your input. Thanks.
Tnx (or rather Thanks) for the seat switch info. I would never try to bypass it; a closed switch just looked weird on the schematic. Technically, there should have been a "shorting device" shown in the switch connector. Your input will save me much time in the diagnostic process.
I would certainly appreciate any input to the possible cause of this problem.
Again, thanks for you reply, Rick
Be the first to rate this
|
I have been dealing with electronics since 1979 and I have never a switch label Sx; unless, like S1 or S5 indicating a switch number.
Yes I agree it should be shown on the diagrams but Husqvarna didn't include in the diagrams and this leads to some confusion by us techs that know how to read the schematics (circuit diagrams). I came during the time here where they were called Sams for the major printer of the these schematics.
From your description it sounds like switch is either bad or the connector is loose (ie not fully plugged in.
Be the first to rate this
|
Thanks for the information regarding the schematic anomalies. With the corrected document, I first checked the location of all components then immediately looked at the seat switch. With your information, I quickly diagnosed a connector problem. Thanks again.
My electronic engineering degree was earned in '73; I experimented in the 60s. I miss the days of SAMS which rarely contained an error or omission. At that time P, I, and E were usual abbreviations. I started learning acronyms when I got an FCC license, like Xmitter. In the 90s, I was lost for 6 months when I went to one of the big 3 LD telcos (Long distance telephone companies). A sentence usually had 4 or more acronyms in it. Like "The sonet ckt at the KCMO ATT GTE demarc is datt." All words in the sentence are acronyms except: The, at, the, & is. We we told to use Sx as SW / Sw was a direction. I became recognized for writing Scopes of Work that contained no English or grammatical errors; this minimized mistakes in the field.
Again, thanks for your input, gotta go mow now.
Be the first to rate this
|