Skyjack SJ4632 & SJIII4632 Service & Repair — Chicagoland | Win Win Equipment
Same-day diagnosis in Addison, IL · SJIII4632, 4620/4626 & 47xx family · Repairs $150/hr · Annual ANSI inspection $225
The SJIII 4632 — also written SJIII4632 or SJ4632, and carried in newer serial ranges under the SJIII 4732 name — is Skyjack’s 32-foot wide-deck warehouse standard: 46 inches wide, 700-pound platform, built to carry stock and two people all day. We repair, inspect, and refurbish them at our Addison, IL shop. We pick yours up and diagnose it the same day; straightforward fixes go back the next day, and complex problems get an honest timeline first. Call 773-790-7299. This page also covers the wide-deck siblings SJIII 4620/4626 (and their 4720/4726 renames).
SJ4632 / SJIII4632 quick service specs
From Skyjack’s service manual (P/N 157928), which covers the SJIII 46xx/47xx wide-deck DC electric family:
| Battery pack | 4 × 6V (24V system) — U2200 standard (U2500 alternate); approved list includes US 2200 XC2 (232 Ah), Trojan T-105 (225 Ah), Discover AGM options |
| Hydraulic oil | ATF Dexron III / Shell Naturelle HF-E 32 |
| Hydraulic tank | 5.8 gal |
| Tires | 16 × 5 × 12 solid rubber |
| Machine weight | ~5,075 lbs (standard extension; check nameplate) |
| Platform capacity | 700 lbs / 2 persons · extension deck 250 lbs |
| Working height | 38 ft (32 ft platform) |
| Rear wheel castle nut | 150 lb-ft (front: finger-tight per factory procedure — don’t guess this one) |
Spec sheet: every unit this page covers
| Spec | SJIII 4620 | SJIII 4626 | SJIII 4632 |
|---|---|---|---|
| Working height | 26 ft | 32 ft | 38 ft |
| Platform height | 20 ft | 26 ft | 32 ft |
| Platform capacity | 1,300 lbs / 3 persons | 1,000 lbs / 3 persons | 700 lbs / 2 persons |
| Machine weight | ~4,100 lbs | ~4,700 lbs | ~5,075 lbs |
| Overall width | 46 in | 46 in | 46 in |
| Tires | 16 × 5 × 12 solid | 16 × 5 × 12 solid | 16 × 5 × 12 solid |
| Hydraulic tank | 5.8 gal | 5.8 gal | 5.8 gal |
| Notes | Also badged 4720 in newer serials | Also badged 4726 | Also badged 4732 |
No error codes on an SJIII4632 — here’s how it actually works
Like every SJIII, the 4632 is relay-based with no fault-code display. Troubleshooting is symptom-first, straight from the factory manual — the only on-machine codes belong to the Delta-Q charger (below).
Troubleshooting by symptom
Completely dead: charger cord still plugged in (interlocks the machine — the most common call we get), then battery disconnect, terminals, battery charge (hydrometer ~1.275; a 0.050 cell spread = failing battery), fuse F1, breaker CB2, e-stops, key switch. Then it’s relay-and-wire work with a meter.
No drive/steer while elevated: pothole protection bars stuck under the machine — clear debris and inspect the linkage before assuming worse.
Drives slow only / no high torque: the high-speed limit switch circuit thinks it’s still elevated — a real repair, not a setting.
Won’t lift: manual lowering valve left open → oil level → load on deck → up valve coil. In that order. A 700-lb deck loaded past its rating simply refuses politely.
Drifts down / won’t hold on a grade: lift cylinder gland seal or the holding-valve stack; brake issues on integral-brake units get the factory ladder. Shop jobs, documented and quoted first.
Charger codes
Solid red = internal charger fault (F-0-0-1 to F-0-0-6; 30-second disconnect reset, replace if it returns). Flashing amber = external: E-0-0-1 voltage high, E-0-0-2 too low to start, E-0-0-3 time limit, E-0-0-4 won’t trickle, E-0-0-7 amp-hour limit. Recurring E-codes = tired batteries far more often than a bad charger.
Annual inspection, pricing, and the honest math
Annual ANSI/OSHA inspection: $225 in-shop, $350 on-site, same-day certificate pre-scheduled, renewal tracked. Repairs $150/hr plus parts, quoted after same-day diagnosis and approved by you. If the estimate crosses half the machine’s value, we’ll show you a refurbished SJIII4632 — or the current-generation SJ4732 — with a fresh inspection on it.
SJ4632 down? Same-day diagnosis.
Call 773-790-7299 or request service.
SJ4632 service FAQ
Is the SJIII4632 the same as the SJIII4732?
Same wide-deck family — newer serial ranges carry the 4726/4732 branding. One factory manual covers both, and we service the whole family, 4620 through 4732.
What batteries does it take?
Four 6-volt flooded batteries (24V pack) — U2200 standard, US 2200/T-105/approved AGM alternates. We install Crown deep-cycle batteries to this spec — a US-built pack that outlasts the cheap imports.
Where are the error codes?
There aren’t any — analog machine. Symptom troubleshooting above, or call with what it’s doing and the serial number.
SJIII4632 or Genie GS-3246?
The two 32-ft wide-deck rivals — we sell and service both: honest side-by-side here.
Spec and troubleshooting data: Skyjack Service & Maintenance Manual P/N 157928 (SJIII 46xx/47xx wide-deck family, covered serial ranges). Trademarks belong to their owners; Win Win Equipment is an independent service shop.
Get your SJ4632 fixed: call 773-790-7299 (Mon–Fri 7am–3pm) or request service online. Also see: service hub · Skyjack service · annual inspection.