How do you calculate hydraulic test capacity?

Multiply assemblies per cycle by available cycles for gross capacity, then multiply by availability and first-pass yield. Here 1 × 42 = 42 gross, then × 88% × 96% = 35.48 good assemblies.

What is first-pass yield on a test stand?

First-pass yield is the share of assemblies that pass the hydraulic test the first time, with no rework. At 96 percent, about 1.48 of the 42 assemblies fail first time and need rework, costing you finished output.

Why is good capacity lower than gross capacity?

Two losses stack: the stand isn't available all the time (88 percent here, a 5.04-assembly downtime loss) and not every unit passes first time (a 1.48-assembly reject loss). Together they cut 42 gross down to 35.48 good.

Should I improve availability or yield first?

Compare the loss columns. In the example downtime loss (5.04) dwarfs reject loss (1.48), so chasing test-stand uptime returns more good assemblies per point gained than chasing yield.

What is a good test stand availability?

World-class test cells often run above 90 percent availability. At 88 percent you are losing more than five assemblies of capacity per 42 cycles, which is usually worth a maintenance or fixturing fix.

Does this account for retesting failed units?

No — it assumes the 42 cycles are consumed by first attempts. If reworked assemblies must use the same finite cycles, effective good capacity is slightly lower than 35.48 and you should reserve cycles for retests.

Forklifts, Lift Equipment & Material Handling Vehicles calculator

Hydraulic Test Capacity Calculator

Hydraulic test capacity tells you how many good, fully-validated hydraulic assemblies a forklift test stand can actually deliver — not the theoretical maximum, but the realistic output after downtime and test failures bite. Test engineers, quality leads, and production planners use it to commit ship dates for mast cylinders, lift pumps, and valve blocks without overpromising. A stand that looks like it can do 42 assemblies rarely does, because availability and first-pass yield each shave the number down. This calculator surfaces those two losses separately so you know whether to chase uptime or chase quality.

What this calculator does

Estimate good hydraulic-test output capacity for lift trucks, masts, cylinders, pumps, valve blocks, or hydraulic assemblies.
Use it when a hydraulic test stand, leak-test station, mast test bay, cylinder bench, or final functional test area must support a production or service schedule.
It computes good test capacity by taking gross capacity (assemblies per cycle times available cycles) and multiplying by stand availability and first-pass yield.

Formula used

Gross hydraulic test capacity = hydraulic assemblies per test cycle × available hydraulic test cycles
Good hydraulic test capacity = gross capacity × hydraulic test stand availability × first-pass hydraulic test yield

Inputs explained

Hydraulic assemblies per test cycle:
Available hydraulic test cycles:
Hydraulic test stand availability:
First-pass hydraulic test yield:

How to use the result

Use it when committing hydraulic-test throughput, sizing a test cell, or diagnosing whether a capacity shortfall comes from downtime or from rework.
It treats availability and yield as steady percentages — a stand with clustered failures or a bad batch will deviate from this average, and it assumes reworked units don't re-enter the same finite cycle count.

Current U.S. benchmarks

On-highway diesel averages $4.58 per gallon this week (EIA), trending down over recent periods. Truck tonnage is up 3.4% year over year (ATA via FRED).
U.S. light vehicles sell at a 16.9 million annual rate (BEA, Jun 2026), up 4.1% from a year earlier, the volume signal for automotive supply chains.
Steel mill PPI stands at 348.53 (BLS, May 2026), up 6.7% from a year earlier. New factory orders are up 2.3% year over year (Census).
The U.S. has 11,691 transportation equipment establishments employing about 1,682,910 workers (Census County Business Patterns, 2023).

Common questions

How do you calculate hydraulic test capacity? Multiply assemblies per cycle by available cycles for gross capacity, then multiply by availability and first-pass yield. Here 1 × 42 = 42 gross, then × 88% × 96% = 35.48 good assemblies.
What is first-pass yield on a test stand? First-pass yield is the share of assemblies that pass the hydraulic test the first time, with no rework. At 96 percent, about 1.48 of the 42 assemblies fail first time and need rework, costing you finished output.
Why is good capacity lower than gross capacity? Two losses stack: the stand isn't available all the time (88 percent here, a 5.04-assembly downtime loss) and not every unit passes first time (a 1.48-assembly reject loss). Together they cut 42 gross down to 35.48 good.
Should I improve availability or yield first? Compare the loss columns. In the example downtime loss (5.04) dwarfs reject loss (1.48), so chasing test-stand uptime returns more good assemblies per point gained than chasing yield.
What is a good test stand availability? World-class test cells often run above 90 percent availability. At 88 percent you are losing more than five assemblies of capacity per 42 cycles, which is usually worth a maintenance or fixturing fix.

Last reviewed 2026-05-12.