Overview & Specs
GT RB500 Grain Dryer Review, Specs & Buyer’s Guide โ Canada
The GT RB500 is a 500-bushel recirculating batch grain dryer from GT Manufacturing โ the centrifugal-fan member of GT’s mid-range batch lineup, pairing a 500-bushel batch with a 38-inch centrifugal fan and a 3-million-BTU burner. With a 335 bu/h drying rate (at 5 points of moisture removal) and PTO drive, it suits mid-size prairie farms that prefer a centrifugal fan’s quieter, high-static-pressure performance. GT has built recirculating batch dryers since 1953.
This guide covers the full official spec sheet, the batch process, Canadian pricing context, ownership notes, and GT lineup comparisons.
Aglist quick take: The RB500 is the centrifugal-fan version of GT’s 500-bushel class โ same capacity as the axial-fan 545XL, but with a 38″ centrifugal fan that runs quieter and handles static pressure well. Strong for mid-size farms wanting that fan character. Where it’s limited: heavier than the 545XL, and batch throughput still caps daily volume versus continuous-flow machines.
Quick Verdict โ Who the GT RB500 Is For
Buy it if: you want a 500-bushel batch dryer with a centrifugal fan (quieter, strong against static pressure), run a mid-size farm, and value simple PTO batch drying. Skip it if: you’d prefer the lighter axial-fan 545XL, need the larger RB600/RB800 batch, or require continuous-flow throughput (NECO or GSI tower).
1. Full GT RB500 Specifications
| Category | Spec | Value |
|---|---|---|
| Type | Dryer design | Recirculating batch |
| Drying capacity | At 20.5โ15.5% (5 pts) | 335 bu/h (8.5 t/h) |
| Bushel capacity | Batch | 500 bu (12.7 tonne) |
| Burner | Max output | 3,000,000 BTU/h (879 kW) |
| Fan | Type | 38″ centrifugal |
| Rating | 16,000 CFM @ 1.5″ SP | |
| Power | PTO speed | 525 rpm |
| Electric motor (option) | 25 HP, 1,750 rpm (18.6 kW) | |
| Recirculating time | 12โ15 min | |
| Augers | Loading/unloading rate | 2,000 bu/h each |
| Dimensions | Diameter of bin | 11 ft (3.4 m) |
| Height to top of auger | 18 ft 4 in | |
| Overall length | 20 ft 5 in | |
| Weight | PTO model | 5,100 lb (2,313 kg) |
| Fuel | Propane (vaporizer included) | |
| Warranty | 2-year limited |
Source: GT Manufacturing official specifications. Standard equipment includes four tires, ladder, eight jack stands, loading hopper, circulating auger, PTO tumbler shaft, dryer controls with grain sampler, fan clutch, access door to plenum, and vaporizer.
2. How the Recirculating Batch Process Works
Grain loads as a batch; a circulating auger keeps it moving while a fan forces heated air through, drying every kernel evenly through repeated recirculation. At target moisture the batch unloads. The RB500’s signature is its 38-inch centrifugal fan, which moves 16,000 CFM and handles static pressure better and more quietly than an axial fan โ the key difference from the otherwise-comparable 545XL. The 12โ15 minute recirculating cycle suits the 500-bushel batch. Daily throughput is set by batch size and cycle time.
3. Owner Reviews & Ratings on Aglist
As Canadian owners share their experience on Aglist, the rating system tracks reliability, real drying capacity, fuel efficiency, ease of operation, and serviceability. If you own or have run a GT RB500 in Canada, please leave a star rating and a short note below.
4. How the GT RB500 Compares
| Spec | GT RB500 | GT 545XL | GT RB600 |
|---|---|---|---|
| Drying capacity | 335 bu/h | 335 bu/h | 385 bu/h |
| Batch capacity | 500 bu | 500 bu | 640 bu |
| Fan | 38″ centrifugal | 32″ axial | 38″ centrifugal |
| Recirc time | 12โ15 min | 12โ15 min | 12โ15 min |
| Weight (PTO) | 5,100 lb | 4,400 lb | 5,100 lb |
Where the RB500 fits: the centrifugal-fan option in GT’s 500-bushel class. The 545XL matches its capacity with a lighter axial fan; the RB600 steps up to a 640-bushel batch with the same centrifugal fan. Choose between RB500 and 545XL by fan preference and weight. See the GT grain dryers hub.
5. Real-World Performance
The RB500’s 335 bu/h at 5 points with a 500-bushel batch makes it a capable mid-size dryer, and the 38-inch centrifugal fan is the reason to choose it over the 545XL โ quieter operation and strong performance against static pressure. The 3M BTU burner supports the batch, and the 11-foot bin with eight jack stands reflects the mid-range build. PTO drive at 525 rpm keeps it usable without three-phase power.
6. Common Problems & Reliability Notes
Transparency note: general batch-dryer considerations, not model-specific defects. Maintain the circulating auger and drive, burner and vaporizer, fan clutch and belt, and PTO driveline; observe propane discipline in cold weather. On a heavier machine, confirm running gear and jack stands on used units.
7. Price Range in Canada
New pricing varies by dealer, configuration, and province โ request a quote from a Canadian GT dealer. Used GT batch dryers appear on AgDealer, Ritchie Bros, and BigIron. GT cites high resale value and 1โ3 year payback.
8. Best Use Cases in Canadian Conditions
Mid-size prairie farms (SK / AB / MB) drying for storage and sale. Remote yards without three-phase power (PTO drive). Operations preferring a centrifugal fan for quieter, high-static-pressure performance. Not ideal for: the largest daily volumes (RB800/RAB) or continuous-flow needs.
9. Maintenance & Service
- Maintain circulating auger and drive
- Service burner and vaporizer; propane discipline in cold
- Check fan clutch, belt, PTO driveline, running gear
- Inspect grain sampler and controls
- Keep a ULC-approved fire extinguisher with the dryer
See the GT grain dryers hub for full guidance.
10. GT RB500 FAQ
How much grain can a GT RB500 dry? 335 bu/h at 5 points of moisture removal, 500-bushel batch. Throughput varies with crop and conditions.
GT RB500 vs 545XL โ what’s different? Same 500-bushel batch and 335 bu/h rate, but the RB500 uses a 38″ centrifugal fan (heavier at 5,100 lb, quieter, strong against static pressure), while the 545XL uses a 32″ axial fan (lighter at 4,400 lb). Choose by fan preference.
Is the RB500 PTO or electric? PTO standard (525 rpm), optional 25 HP electric motor.
Is it still made? Yes โ part of GT’s current RB batch series.
11. Related Models on Aglist
- GT 545XL โ same batch, axial fan
- GT RB600 โ larger 640-bu batch, centrifugal fan
- GT RB800 โ largest 820-bu batch
- GT Grain Dryers Compared โ full GT lineup hub
- NECO Mixed-Flow Dryers โ continuous-flow alternative
- Best Grain Dryers in Canada โ full buyer’s guide
Disclaimer
Specifications sourced from GT Manufacturing’s official model pages; specs subject to change without notice. Pricing varies by dealer, configuration, and province. Reviews on Aglist are written by real users and moderated for spam โ opinions are personal. Always confirm specifications with your GT dealer and the owner’s manual before purchase, service, or repair.
12. GT RB500 Reviews & Ratings
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